Question

Milk is pouring into a cuboidal reservoir at the rate of 60 litres per minute. If the volume of reservoir is $108m^3$. Find the number of hours it will take to fill the reservoir.

• A. 35
• B. 38
• C. 40
• D. 30

Answer 1

The correct option is D 30

Volume of reservoir
= $108m^3=108\times 1000litres$
$(\because 1m^3=1000litres)$
The reservoir is filling at the rate of 60 litres per minute.
$\therefore$ Required time $=\frac{108\times 1000}{60}\text{min}$
$=\frac{108\times 1000}{60\times 60}\text{hours}$
= 30 hours