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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 petrol was consumed by the car in total journey?


consumption=xkm per litre
fuel consumed=400/x
after servicing
consumption rate=(x+5)
fuel consumed=400/(x+5)
total litres of fuel=400/x +400/(x+5)
2 3 2
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