A car travels a distance of 400 km and consumes x km per litre of fuel. then the driver gets the engine serviced. the same car then travels a distance of 400 km but the fuel consumption is (x+5)km per litre. how many litres of pertrol is consumed in the total journey ? do you think the driver could have saved more petrol ? if so, how ?
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Total consumption of the fuel is (400/x)+(400/(x+5))
= (400 (x+5) + 400 x) / (x (x+5))
= (400 (2x+5) ) / ( x (x+5) ) litres of petrol.
= (400 (x+5) + 400 x) / (x (x+5))
= (400 (2x+5) ) / ( x (x+5) ) litres of petrol.
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