Question

how many cubic meters of earth must be dug to construct a 7 m deep well and diameter is 2 m​

Answer 1

Answer:308m^2

Step-by-step explanation:

Volume of cylinder=πr^2h

Answer 2

The cubic metres of Earth dug out is equal to 22 m².

Given that the depth of well (h) dug is equal to 7 m and the radius of the well (r) = 2/2 = 1 m.

The cubic metres of Earth dug out will be equal to the volume of the well.

Volume of the well = π(radius)²×depth of the well

= (22/7)×1×7

= 22 m²