Question

Q2

How
many cubic metres of earth must be dug to construct a well 7
m deep and of diameter 2.8 m?
​

Answer 1

43.103m³

Explanation:

This is just finding the volume of a cylinder problem.

Area of a circle = πr²

Area of circle * length of cylinder = volume

3.14*(1.4)² = 6.158m²

6.158*7 = 43.103m³