Answers

2015-03-14T12:12:59+05:30
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
???
no..
ynx
tnx