Question

A well is dug with diameter 3 m and 21m deep and the earth dug out is used to form an embankment 4m wide around it . Find the height of the embankment

Answer 1

hey frnd here's your answer

vol of well = vol of embankment

πr2H=πh(R2-r2). (cancel π from both sides)
=)1.5×1.5×21=h(5.5×5.5-1.5×1.5)
=)h=47.25/28
=)h=1.6875m=168.75cm

Hope it helps you.

Answer 2

Answer:

Step-by-step explanation:

hey frnd here's your answer

vol of well = vol of embankment

πr2H=πh(R2-r2). (cancel π from both sides)

=)1.5×1.5×21=h(5.5×5.5-1.5×1.5)

=)h=47.25/28

=)h=1.6875m=168.75cm

Hope it helps you.