Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

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

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

-Albert Einstein

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

Hi bobbym and Maburo,

The solutions #5117 and #5118 are correct. Excellent, bobbym and Maburo!

(The solution #5117 is room for ambiguity. Regretted.)

#5119. A rectangular plot is half as long as it is broad and its area is

hectares. Then, find its length.#5120. A courtyard 25 meters long and 16 meters broad is to be paved with bricks of dimensions 20 centimeters by 10 centimeters. Find the total number of bricks required.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

Offline

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

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

-Albert Einstein

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

Hi Maburo and bobbym,

The solutions #5119 and #5120 are correct. Splendid, Maburo and bobbym!

#5121. The cost of carpeting a room 18 meters long with a carpet 75 centimeters wide at $4.50 per meter is $810. Find the breadth of the room.

#5122. The diagonal of the floor of a rectangular closet is 7.5 feet. The shorter side of the closet is 4.5 feet. What is the area of the closet in square feet?

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

The solution #5122 is correct. Remarkable!

#5123. The length of a rectangle is three times its width. If the length of the diagonal is

centimeters, find the perimeter of the rectangle.#5124. The diagonal of a rectangle is thrice its smaller side. Find the ratio of the length to the breadth of the rectangle.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

Offline

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

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

-Albert Einstein

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

Hi Maburo and bobbym,

The solution #5123 is correct. Excellent, Maburo and bobbym!

.

The solution #5124 is correct, bobbym! Excellent!

#5125. A rectangular carpet has an area of 120 square meters and a perimeter of 46 meters. Find the length of its diagonal.

#5126. A diagonal of a rectangle is

centimeters and its area is 20 square centimeters. Find the perimeter of the rectangle.Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

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.

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

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?

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

Offline

**ElainaVW****Member**- Registered: 2013-04-29
- Posts: 482

Hello:

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

Hi ElainaVW,

Thanks a lot.

bobbym : Get well soon!

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

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?

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

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

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

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

-Albert Einstein

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

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.

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

Offline

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

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

-Albert Einstein

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,800

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,335

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?

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

Offline