Question:A right cylinder and a right circular cone have the same radius and the same volume.The ratio of the height of the cylinder to that of the cone is : 

A `3 : 5` 
B `2 : 3` 
C `3 : 1` 
D `1 : 3` 

+ Answer
D 

+ Explanation
Let radius of each be r, the height of cylinder be H & the height of the cone be h. Then,

`π r^2 H = 1/3 π r^2 h`

`or H/h = 1/3, i. e. 1 : 3.`

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Irin Moni

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