Question

a conical pit having top diameter 7 mt is 12 m deep what is capacity in litres

Answer 1

volume of cone = 1/3
$volume \: of \: cone \: 1 \div 3\pi {r}^{2} h$
so
d=r/2
which is
3.5 and
h=12m
1/3×22/7×7/2×7/2×12=462m^3 (1m^3=1000litres)
=462000 litres

Answer 2

Diameter=7m
Length =12m
Volume=?

Volume of cone = 1/3 Pi ^2h
= 1/3 multiply 22/7 multiply 7/2 multiply 7/2 multiply 12
= 77m cube
1m cube = 1000l
Volume in litres = 77000l.