Question:If the curved surface area of a cylinder is `1760 sq`. cm and its base radius is `14 cm`, then its volume is : 

A `12320 cm^3` 
B `6160 cm^3` 
C `77440 cm^3` 
D None 

+ Answer
A 

+ Explanation
`(2π rh)/r`

`= 1760/14 ⇒ h`

`= 1760/14 xx 1/(2π)`

`= (1760/14 xx 1/2 xx 7/22)`

`20 cm.`

:. Volume`=π r^2 h`

`= (22/7 xx 14 xx 14 xx 20) cm^3`

`= 12320 cm^3.`

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Irin Moni

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