Question

A 10m deep well of diameter 1.4 m is dug up in a field and the earth from digging is spread evenly on the adjoining rectangular field. The length and breadth of that fieldare 55m and 14m respectively. Find the thickness of the earth layer spread.

• A. $0.02m$
• B. $0.05m$
• C. $0.04m$
• D. $0.07m$

Answer 1

The correct option is A $0.02m$

well's diameter =1.4 m, radius=0.7m
depth=10m
length field = 55m
and breadth = 14m
as per question
volume of well = volume of field
$\Pi r^{2}h=l\ast b\ast h$
$\Pi {\left(0.7\right)}^2\ast 10=55\ast 14\ast h$
$h=0.02$