Question:The height of a cylinder is `14` cm and its curved surface area is `704` sq. cm, then its volume is : 

A `2816 cm^3` 
B `5632 cm^3` 
C `1408 cm^3` 
D `9856 cm^3` 

+ Answer
A 

+ Explanation
`(2πrh)/h`

`= 704/14 ⇒ 2π r = 704/14.`

`:. r = (704/14 xx 1/2 xx 7/22) = 8 cm.`

:. Volume`= (22/7 xx 8 xx 8 xx 14) cm^3`

`= 2816 cm^3.`

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Irin Moni

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