Question

Water is being poured into a cuboidal reservoir at the rate of 60 litres per minute. If the sides of the reservoir are 9m, 6m and 2m, find the number of hours it will take to fill the reservoir. [4 MARKS]

Answer 1

Formula usage: 1 Mark
Solution: 3 Marks

Volume of the cuboidal reservoir
$=9\times 6\times 2=108m^3$

We know $1m^3=1000L$

Volume of the cuboidal reservoir
$=108\times 1000=108000L$

60 liters per minute
$=60\times 60Lperhour=3600Lperhour$

Time required to fill the reservoir
$=\frac{108000}{3600}=30hours$