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 4 of 4.
Rashmi said:
1 decade ago
Can anybody say me how did we get 1/20?
Prasad said:
1 decade ago
Simple. The volume is given in mm and the length in meters. Hence the length should be minimal.
Rakesh said:
1 decade ago
When 1mm diameter is converted into radius it is .5 mm or .5/1000 meter.
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.
Anju said:
1 decade ago
From where d 22/7 came?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers