Question

5. How many cubic metres of earth must be dug out
to sink a well which is 20m deep and has a diameter
of 7 metres. If the earth so dug out is spread over
a rectangular plot 28m by 11 m, what is the height
of the platform so formed?​

Answer 1

Answer:

if ans is helpful plz follow

Answer 2

Answer:

Step-by-step explanation

Height = 20

Diameter=7

Volume=πr ^2h

=22/7×7/2×7/2×20

=770m^3

Dimensions of rectangular plot=28 , 11

Volume =770

V=lbh

770=28×11×h

H=5/2