Question 59

A car uses 18 litres of petrol in travelling 270 kilometers. In order for the car to travel the same distance using 10 litres of petrol, by how many kilometers per litre must the car’s fuel mileage be increased?

Solution

Mileage when car uses 18 litres to travel 270 km = $$\frac{270}{18}$$ = 15 km/litre

Mileage required to travel 270 km using 10 litres = $$\frac{270}{10}$$ = 27 km/litre

Mileage should be increased by 27-15 = 12 km/litre

Answer is option A.

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