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Q.

A hemispherical bowl of internal diameter 36 cm   contains liquid. This liquid is filled into cylindrical shaped bottles of radius 3 cm   and height 6 cm  . How many bottles are required to empty the bowl?


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a

70

b

80

c

82

d

72 

answer is D.

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Detailed Solution

Given that a hemispherical bowl of internal diameter 36 cm  and cylindrical shaped bottles of radius 3 cm   and height 6 cm  .
We have the following formulae,
Volume of a hemisphere = 2 3 π r 3  
Volume of a cylinder = π r 2 h  
Volume of hemisphere = n×  volume of cylindrical bottle
2 3 ×π (18) 3 =nπ× (3) 2 ×6 2 3 × (18) 3 =n× (3) 2 ×6 n= 2 3 × 18×18×18 9×6 n=72  
Thus, the number of bottles required is 72.
Therefore the correct option is 4.
 
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