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.
Adil said:
10 years ago
Please tell the formula.
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.
Avani said:
9 years ago
@Rashmi, @Megha.
1cm=10mm.
? =1/2mm.
Cross multiplication
1/2 * 1/10.
= 1/2 * 10.
= 1/20 m.
1cm=10mm.
? =1/2mm.
Cross multiplication
1/2 * 1/10.
= 1/2 * 10.
= 1/20 m.
Aboo farhan said:
9 years ago
We know that d = 2r then r = d/2mm and here d is given 1mm and 1mm convert in cm then r = 1/20cm.
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