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 3 of 4.
Chenga said:
8 years ago
Please tell why the shape of wire is consider as a cylinder?
(2)
Ayush said:
1 decade ago
Please tell why the shape of wire is considered as cylinder?
Shiwani said:
8 years ago
1mm=1/1000m, so 1/2000m.
And 1m=100cm, so 1/2000m=1/20cm.
And 1m=100cm, so 1/2000m=1/20cm.
Archana said:
9 years ago
@Adil.
Formula of volume of cylinder is Pi * r * r * h.
Formula of volume of cylinder is Pi * r * r * h.
Surya said:
5 years ago
How 22/7 possible?
Is it pi value?
π = 3. 144 right?
Is it pi value?
π = 3. 144 right?
Kartik said:
5 years ago
Without converting mm into cm answer will be the same ?
Shuvan.s said:
4 years ago
Why do they take 22/2 * 1/20 * 1/20? Please explain it.
(1)
Jai said:
6 years ago
Because the wire is in the shape of a cylinder.
Rashmi said:
1 decade ago
Can anybody say me how did we get 1/20?
Anitha said:
5 years ago
@Surya.
22/7 approximately = 3.14.
22/7 approximately = 3.14.
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