Question
The curved surface area of a cylindrical pillar is 264 `m^2` and is volume is 924 `m^3`. Find the ratio of its diameter to its height .
Answer: Option B
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`( pi r^2 h)/(2 pi r h)= 924/264`
`hArr r = (924/264 xx2) ` = 7 m
and , ` 2 pi r h = 264`
`h = (264 xx 7/22 xx 1/2 xx 1/2)` = 6 m
`:.` Required ratio = `(2pi)/(h )= 14/6 = 7/3` = 7 : 3
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