Question:Two cylinder jars have their diameters in the ratio of `3 : 1` and their heights in the ratio of `1 : 3.` The volumes are in the ratio of : 

A `1 : 2` 
B `3 : 1` 
C `3 : 4` 
D `2 : 3` 

+ Answer
B 

+ Explanation
Let their radio be `3x` x & heights be y & `3y`.

Ratio of their volumes 

`= (π xx (3x)^2 xx y)/(π xx x^2 xx 3y)`

`= 3/1, i e. 3 : 1.`

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Irin Moni

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