Question:
The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height.
[A].3 : 7
7 : 3
6 : 7
7 : 6
The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
| r2h | = | 924 | r = | 924 | x 2 | = 7 m. | ||
| 2rh | 264 | 264 |
| And, 2rh = 264 h = | 264 x | 7 | x | 1 | x | 1 | = 6m. | ||
| 22 | 2 | 7 |
| Required ratio = | 2r | = | 14 | = 7 : 3. |
| h | 6 |