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Volume and Surface Area

Q1:

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

ANS:B - 7 : 3

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



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