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

162m³

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138m³

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178m³

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154m³

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Solution

The correct option is D
154m³

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 upto the depth of 12 m .It is then closed with lid of diameter 7m which exactly fitted on it. The volume of petrol that can be filled in it is

The correct option is D 154m3 Depth = height= 12 m Radius= Diameter2 = 3.5 m Volume of the pit= 13 π r2 h= 154 m3

The correct option is D
154m³

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 $m^{3}$