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A conical pit of top diameter 3.5 m is 12 m deep. What is its capacity in kilolitres?

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a
38.5 kilolitres
b
40 kilolitres
c
45 kilolitres
d
50 kilolitres 

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detailed solution

Correct option is A

Given, diameter d=3.5   m.
so, r= d 2   r= 3.5 2   r=1.75  m
The radius of conical pit is 1.75 m.
The capacity of conical pit = 1 3 π r 2 h    1 3 × 22 7 × (1.75) 2 ×12   38.5 m 3   Since 1 m 3 =   1 kilolitres then,
The capacity of the conical pit is 38.5 kilolitres.
Therefore, the correct option is 1.
 

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