Car $A$ travels $x$ km for every litre of petrol, while car $B$ travels $(x + 5)$ km for every litre of petrol.Write down the number of litres of petrol used by car $A$ and car $B$ in covering a distance of $400$ km

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Solution

Given Distance $= 400$ km
Car $A$ travels $x$ km /litre.
Car $B$ travels $(x + 5)$ km/litre.
Number of litre used be car in covering $400$ litres $= A = \frac{D i s t a n c e}{s p e e d o f c a r A} = \frac{400}{x}$ litre.
Number of litre used be car in covering $400$ litres $= B = \frac{D i s t a n c e}{s p e e d o f c a r B} = \frac{400}{x + 5}$ litre.

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