Question

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

Answer 1

Answer:

22 metres³

Step-by-step explanation:

well is in shape of cylinder

consider " # " to be pi

volume of cylinder = # r²h

diameter = 2 m so radius = 1 m

so volume of well = 22/7 x 1² x 7

= 22/7 x 1 x 7

7 and 7 will be cancelled

so volume = 22 metres³

so 22 metres³ earth must be dug out