Question:A hemisphere bowl of internal radius `9` cm contains a liquid. This liquid is to be filled into cylindrical shaped small bottles of diameter `3` cm and height `4` cm.  How many bottles will be needed to empty the bowl ? 

A `27` 
B `35` 
C `54` 
D `63` 

+ Answer
C 

+ Explanation
Volume of bowl 

`= (2/3 π xx 9 xx 9 xx 9) cm^3`

`= 486 π cm^3`

Volume of `1` bottle 

`= (π xx 3/2 xx 3/2 xx 4) cm^3`

`= 9 π cm^3.

Number of bottles

`= ((486 π)/(9π))`

`= 54.`

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Irin Moni

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