Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 4)
4.
66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be:
Answer: Option
Explanation:
Let the length of the wire be h.
| Radius = | 1 | mm | = | 1 | cm. | Then, |
| 2 | 20 |
 |
22 | x | 1 | x | 1 | x h = 66. |
| 7 | 20 | 20 |
| h = |
 |
66 x 20 x 20 x 7 |  |
= 8400 cm = 84 m. |
| 22 |
Discussion:
35 comments Page 2 of 4.
Richa said:
1 decade ago
Its formula pai*r^2*h.
Pai's value is 22/7.
I'm not gettng the sign of pai in computer. Ok.
Pai's value is 22/7.
I'm not gettng the sign of pai in computer. Ok.
Akchansh said:
4 years ago
Length of wire should be whole perimeter of cyclinder, why it is calculated same as height?
(2)
Amit said:
9 years ago
1/2 is divided by 10.
1/2/10 = 1/2/10 (1/2/10/1 same thing).
Then.
1/2 * 1/10 = 1/20.
1/2/10 = 1/2/10 (1/2/10/1 same thing).
Then.
1/2 * 1/10 = 1/20.
Uma said:
10 years ago
How we know that the wire convert into cylinder form, may be its convert other shapes.
Deepi said:
1 decade ago
@ Rashmi,
1cm=10milimeter
to convert mm into cm we have to multiply it by 10
1cm=10milimeter
to convert mm into cm we have to multiply it by 10
Suhani bajpai said:
9 years ago
What is meant by 66 cubics? and why is it equal to the volume of a cylinder?
Gautam singh said:
1 decade ago
1cm = 10 millimeter.
To convert km into cm we have to multiply it by 10.
To convert km into cm we have to multiply it by 10.
Rakesh said:
1 decade ago
When 1mm diameter is converted into radius it is .5 mm or .5/1000 meter.
Ashok said:
9 years ago
@Suhani.
Yes. I too have same doubt.
Can anyone explain us please?
Yes. I too have same doubt.
Can anyone explain us please?
Megha said:
1 decade ago
Still I didn't get how we get 1/20? Please explain me step by step.
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