A container of petrol on a set of scales is used to measure the rate at which fuel is used by an engine under test. In one test the weight measured by the scales decreases by 25.0 N in 1 hour. (Assume the specific gravity of petrol is 0.720 and g is 9.81 m/s^2)
What is the rate (in L/s) of fuel used by the engine in this test