A conical pit is dug into the earth up to the depth of 12 m. It is then closed with a lid of diameter 7m which exactly fitted on it. Find the volume of petrol that can be filled in the conical pit.

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Solution

Depth = height= 12 m

Radius= $\frac{D i a m e t e r}{2}$ = 3.5 m

Volume of the pit= $\frac{1}{3}$ $π$ $r^{2}$ h= 154 $m^{3}$

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A conical pit is dug into the earth up to the depth of 12 m. It is then closed with a lid of diameter 7m which exactly fitted on it. Find the volume of petrol that can be filled in the conical pit.

Depth = height= 12 m Radius= Diameter2 = 3.5 m Volume of the pit= 13 π r2 h= 154 m3

Depth = height= 12 m

Radius= $\frac{D i a m e t e r}{2}$ = 3.5 m

Volume of the pit= $\frac{1}{3}$ $π$ $r^{2}$ h= 154 $m^{3}$