1.  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
B. 7 : 3
C. 6 : 7
D. 7 : 6

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
22 2 7
= 6m.

Required ratio = 2r = 14 = 7 : 3.
h 6