How many cubic metres of earth must be dug to make a well $14$ metres deep and $4$ metres in diameter?

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Solution

Earth to be dug out from the well
$=$ Volume of cylindrical well
$= π r^{2} h = \frac{22}{7} \times 2 \times 2 \times 14$
$176$ cu.m

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How many cubic metres of earth must be dug to make a well 14 metres deep and 4 metres in diameter?

Earth to be dug out from the well= Volume of cylindrical well=πr2h=227×2×2×14176 cu.m

How many cubic metres of earth must be dug to make a well $14$ metres deep and $4$ metres in diameter?

Earth to be dug out from the well
$=$ Volume of cylindrical well
$= π r^{2} h = \frac{22}{7} \times 2 \times 2 \times 14$
$176$ cu.m