Question

Q36. A certain car uses 12 litres of petrol in traveling 240 kms. In order for the car to travel the same distance using 10 litres of petrol, by how what percentage must the car’s mileage in kms per litre be increased?

• A. (a) 20
• B. (b) 25
• C. (c) 4
• D. (d) 8

Answer 1

The correct option is A

(a) 20

Initial mileage = 20 kms/ltr;

To travel 240 kms with 10 ltrs, mileage should be = 240/10 = 24 kms/ltr;

$\%increase=\frac{(24-20)}{20}\times 100=20\%$