Question

how many cubic metres of earth must be dug out to sync a well 16 m in depth and 7 m in diameter

Answer 1

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Here is the solution:

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Find the radius:

Radius = Diameter  ÷ 2

Radius = 7 ÷ 2 = 3.5 m

Find the volume:

Volume = πr²h

Volume = π(3.5)² (16) = 616 m³

Answer: 616m³ of the earth should be dug out.

Answer 2

Answer:

it is correct..........