Question

Water is pouring into a cuboidal reservoir at a rate of 60 litre per minute. If area of the base of the reservoir is 36 sq. metre and the depth is 3 metre, then the time taken to fill the tank completely is

Answer 1

Volume of the reservoir =108 m

3

=108×1000 litres

(∵1m

3

=1000 litres)

The reservoir is filling at the rate of 60 litres per minute.

∴ Required time =

60

108×1000

min.

=

60×60

108×1000

hours=30 hours