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#151 2015-06-13 00:17:27

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 65 is correct. Brilliant!

M # 66. A lead pencil is in the shape of right circular cylinder. The pencil is 28 centimeters long and its radius is 3 millimeters. If he lead is of radius 1 millimeter, then find the volume of the wood used in the pencil.


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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#152 2015-06-16 19:46:47

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

Re: Mensuration

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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#153 2015-06-16 23:41:35

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 66 is correct. Brilliant!

M # 67. Find the mass of 200 steel spherical ball bearings, each of which has radius 0.7 centimeter, given that the density of steel is 7.95 grams per cubic centimeters.
(Mass = Volume x Density).

.


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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#154 2015-06-20 02:42:34

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

Re: Mensuration

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

#155 2015-06-20 17:28:27

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 67 is correct. Immaculate!

M # 68. How many iron rods, each of length 7 meters and diameter 2 centimeters can be made made out of 0.88 cubic meter of iron?


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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#156 2015-06-21 10:01:08

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

Re: Mensuration

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

#157 2015-06-21 16:12:33

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

M # 69. The radii f two cylinders are in the ratio 3:5 and their heights are in the ratio 2:3. Find the ratio of their curved surface areas.


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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#158 2015-06-22 11:14:06

math9maniac
Member
From: Tema
Registered: 2015-03-30
Posts: 443

Re: Mensuration

2:5


Only a friend tells you your face is dirty.

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#159 2015-06-22 13:17:35

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

Re: Mensuration

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

#160 2015-06-22 18:50:20

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi math9maniac and bobbym,

The solution M # 69 is correct. Good work!

M # 70. If 1 cubic centimeter of cast iron weighs 21 grams, then find the weight of a cast iron pipe of length 1 meter with a bore of 3 centimeters and in which thickness of the metal is 1 centimeter.


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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#161 2015-06-22 19:35:58

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

Re: Mensuration

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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#162 2015-06-22 21:00:29

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

M # 71. Fnd the length of canvas 1.25 meter wide required to build a conical tent of base radius 7 meters and height 24 meters.


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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#163 2015-06-23 14:34:52

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

Re: Mensuration

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

#164 2015-06-23 17:00:04

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 71 is correct. Good work!

M # 72. The heights of two right circular cones are in the ratio 1:2 and the perimeters of their bases are in the ratio 3:4. Find the ratio of their volumes.


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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#165 2015-06-24 17:42:10

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi,

M # 73. The diagonal of a cube is

centimeters. Fnd its volume and surface 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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#166 2015-06-27 19:10:34

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

Re: Mensuration

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

#167 2015-06-28 15:33:31

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 73 is correct. Neat work!

M # 74. Find the slant height, volume, and total surface area of a cone of radius 21 centimeters and height 28 centimeters.

.


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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#168 2015-07-12 04:40:33

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

Re: Mensuration

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

#169 2015-07-12 14:18:13

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 74 (all the three parts) is correct. Excellent!

M # 75. Find the number of lead balls, each 1 centimeter in diameter that can be made from a sphere of diameter 12 centimeters.


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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#170 2015-07-12 22:22:59

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

Re: Mensuration

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

#171 2015-07-13 00:27:34

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 75 is correct. Good work!

M # 76. A copper sphere of diameter 18 centimeters is drawn into a wire of diameter 4 millimeters. Find the length of the wire.


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

#172 2015-07-13 00:42:54

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

Re: Mensuration

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

#173 2015-07-13 03:08:19

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution M # 76 is correct. Marvelous!

M # 77. How many spherical bullets can be made out of a lead cylinder 28 centimeters high and with base radius 6 centimeters, each bullet being .1.5 centimeters in diameter?


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

#174 2015-07-30 14:41:05

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

Re: Mensuration

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

#175 2015-07-30 15:14:05

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,967

Re: Mensuration

Hi bobbym,

The solution

M # 78. Find the total surface area of a hemisphere of radius 10.5 centimeters.


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

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