8.Water is pouring into a cuboidal reservoir at the rate of 60 liters per minute. If the volume of reservoir is 108 $$m^3$$, find the number of hours it will take to fill the reservoir.
Given,Volume of the reservoir = 108 $$m^3$$ = 108000 L [∵1 $$m^3$$ = 1000 L]
Time taken to fill the reservoir=$$\frac{Volume\;of\;reservoir}{Rate of flowing water}$$
$$=\frac{10800}{60}minutes=1800\;minutes\; or \;\frac{11800}{60}=30\; hours$$