Question

A well is dug 12m deep and has a radius of 0.7m. The earth taken out is spread over a rectangular plot 11m by 14m to raise the ground . What is the height by which the ground is raised ?

Answer 1

both volume are same so volume of well=volume of plot so put the value so last we will find H

Answer 2

cylindrical well dug
height = 12m
radius = 0.7m
a cubiodal platform
length = 11m
breadth = 14m
let the height of the ground is h meter
volume of well dug = Volume of the platform


$\pi \: r ^{2} \: h = l \times b \times h$
$\pi \: \binom{7}{10} ^{2} \times12 = 11 \times 14 \times h \\ h = \frac{49 \times 12 \times 22}{100 \times 11 \times 14 \times 7}$
0.12m = h