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A car travels a distance of 400km and consumes xkm/l of fuel. then the driver gets the engine serviced. the same car then travels a distance of 400km but

the fuel consumption is (x+5)km/l. how many liters of petrol was consumed by the car in total journey?


Total distance=400 km
consumes x l/km
total petrol used= \frac{400}{x}
distance=400 km
after service= x+5 l/km
total petrol used= \frac{400}{x+5}

Grand total= \frac{400}{x} + \frac{400}{x+5}  \\  \\ 
\frac{400x+2000+400x }{ x^{2} +5x}  \\  \\ 
 \frac{800x+2000}{ x^{2} +5x}
1 5 1
but u can also get a real number as answer
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