Question

A tanker is filled with 1000litres of petro .due to some leakage quantity of petrol change by -7 litres per hour .how much petrol will be left in the tanker after 2 days.

Answer 1

Initially the amount of petrol in the tank= 1000 l

petrol lost in 1 he= 7 l

so petrol lost in 2*24 hours= 7*2*24 = 336 l

so

Petrol left finally= (1000 - 336) l

                          = 664 l of petrol