Volume and Surface Areas | Arithmetic aptitude | Discussion Page

How many cubic metres of earth must be dug out to sink a well22.5m deep and diameter 7m?

$800m^{3}$

$845m^{3}$

$866.25m^{3}$

$832.5m^{3}$

Option C

Depthof the well=22.5m

Volume of the well $=\pi r^{2}h$ $=\frac{22}{7}\times \frac{7}{2}\times \frac{7}{2}\times 22.5$

$866.25m^{3}$

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