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Question

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

A
38.5 kl
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B
48.5 kl
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C
32.5 kl
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D
28.5 kl
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Solution

The correct option is D 38.5 kl
For a conical pit, diameter d=3.5m.
Radius (r)=d2=3.52m=1.75m.
Also, Depth (h)=12m.

Capacity of the conical pit
=13πr2h=13×227×(1.75)2×12
=38.5m3=38.5×1000l=38.5kl.

Hence, option A is correct.

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