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#5001 2014-07-09 00:17:17

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym,

The solutions #5125 and #5126 are correct. Exemplary!

#5127. 'A' took 15 seconds to cross a rectangular field diagonally walking at the rate of 52 meters per minute and 'B' took the same time to cross the same field along its sides walking at the rate of 68 meters per minute. Find the area of the field.

#5128. A rectangular carpet has an area of 60 square meters. If its diagonal and longer side together equal 5 times the shorter side, find the length of the carpet.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5002 2014-07-09 05:50:20

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi;



In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5003 2014-07-09 10:05:14

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym,

The solution #5128 is correct. Neat work, bobbym!

#5129. A rectangle had width 'a' and length 'b'. If the width is decreased by 20% and the length is increased by 10%, then what is the area of the new rectangle in percentage compared to 'ab'?

#5130. If the length and breadth of a rectangular plot is increased by 50% and 20% respectively, then how many times will its area be increased?


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5004 2014-07-09 19:36:42

ElainaVW
Member
Registered: 2013-04-29
Posts: 580

Re: 10 second questions

Hello:

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#5005 2014-07-09 22:15:44

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi ElainaVW,

Thanks a lot.

bobbym : Get well soon!


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5006 2014-07-09 22:34:24

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

She made it sound like I was a goner. I was just a little bit tired.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5007 2014-07-09 23:23:38

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym,

The solution #5129 is perfect.

The solution 5130 : New area = (9/5 x length x breadth).
Increase = 4/5 times.

The solution #5130 is correct too.

Marvelous, bobbym! (#5129 and #5130).

#5131. A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. Find the percentage of decrease in area.

#5132. The length of a rectangle is halved, while its breadth is tripled. What is the percentage change in area?


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5008 2014-07-10 00:43:16

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5009 2014-07-10 01:26:11

Maburo
Member
From: Alberta, Canada
Registered: 2013-01-08
Posts: 287

Re: 10 second questions



"Pure mathematics is, in its way, the poetry of logical ideas."
-Albert Einstein

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#5010 2014-07-10 03:40:30

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym and Maburo,

The solutions #5131 and #5132 are correct. Exemplary, bobbym and Maburo!

#5133. The length of a rectangle is is increased by 60%. By what percent would the width have to be decreased so as to maintain the same area?

#5234. The length of a rectangle is decreased by r%, and the breadth is increased by (r + 5)%. Find r, if the area of the rectangle is unaltered.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5011 2014-07-10 03:48:46

Maburo
Member
From: Alberta, Canada
Registered: 2013-01-08
Posts: 287

Re: 10 second questions


"Pure mathematics is, in its way, the poetry of logical ideas."
-Albert Einstein

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#5012 2014-07-10 04:03:05

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5013 2014-07-11 00:44:04

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi Maburo and bobbym,

The solutions #5133 and #5134 are correct. Remarkable, Maburo and bobbym!

#5135. If the area of a rectangular plot increases by 30% while its breadth remains same, what will be the ratio of the areas of new and old figures?

#5136. What will be the cost of gardening 1 meter broad boundary around a rectangular plot having perimeter of 340 meters at the rate of $10 per square meter?


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5014 2014-07-11 02:00:51

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi ganesh;



In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5015 2014-07-11 02:19:06

Maburo
Member
From: Alberta, Canada
Registered: 2013-01-08
Posts: 287

Re: 10 second questions



"Pure mathematics is, in its way, the poetry of logical ideas."
-Albert Einstein

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#5016 2014-07-11 12:08:10

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym and Maburo,

The solution #5136 is correct, bobbym! Good work!

The solutions #5135 and #5136 are correct, Maburo! Marvelous!

#5137. A room is 15 feet long and 12 feet broad. A mat has to be placed on the floor of this room leaving 18 inches space from the walls. What will be the cost of the mat at the rate of $3.50 per square feet?

#5138. 2 meters broad pathway is to be constructed around a rectangular plot on the inside. The area of the plot is 96 square meters. The rate of construction is $50 per square meter. Find the total cost of the construction.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5017 2014-07-11 13:29:07

Maburo
Member
From: Alberta, Canada
Registered: 2013-01-08
Posts: 287

Re: 10 second questions


"Pure mathematics is, in its way, the poetry of logical ideas."
-Albert Einstein

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#5018 2014-07-11 19:48:39

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi Maburo,

The Solution #5137 is correct. Remarkable, Maburo!

The solution #5138, as you pointed out, is arbitrary. I shall wait for bobbym's solution #5137.

bobbym, please ignore problem #5138. Please answer #5137 alone.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5019 2014-07-11 20:18:53

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

#5020 2014-07-11 23:26:01

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi Maburo and bobbym,

The solution #5137 is correct. Marvelous, Maburo and bobbym!

#5139. Within a rectangular garden 10 meters wide and 20 meters long, we wish to pave a walk around the borders of uniform width so as to leave an area of 96 square meters for flowers. How wide should the walk be?

#5140. A rectangular lawn 55 meters by 35 meters has two roads each 4 meters wide running in the middle of it, one parallel to length and the other parallel to breadth. Find the cost of gravelling the roads at 75 cents per square meter.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

#5021 2014-07-12 00:36:19

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

#5022 2014-07-13 00:12:32

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym,

The solutions #5139 and #5140 are correct. Excellent!

#5141. A rectangular park 60 meters long and 40 meters wide has two concrete crossroads running in the middle of he park and the rest of the park has been used as a lawn. If the area of the lawn is 2109 square meters, then what is the width of the road?

#5142. A housing society has been allotted a square piee of land measuring 2550.25 square meters. What is the side of the plot?


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

#5023 2014-07-13 01:16:14

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

#5024 2014-07-13 01:56:41

Maburo
Member
From: Alberta, Canada
Registered: 2013-01-08
Posts: 287

Re: 10 second questions


"Pure mathematics is, in its way, the poetry of logical ideas."
-Albert Einstein

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#5025 2014-07-14 00:13:45

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: 10 second questions

Hi bobbym and Maburo,

The solutions #5141 and #5142 are correct. Excellent, bobbym and Maburo!

#5143. The cost of cultivating a square field at the rate of $135 per hectare is $1215. What would be the cost of putting a fence around it at the rate of 75 cents per meter?

#5144. The perimeters of five squares are 24 centimeters, 32 centimeters, 40 centimeters, 76 centimeters, and 80 centimeters respectively. Find the perimeter of another square equal in area to the sum of the areas of these squares.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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