CAT 2000 — QA Question 5
VariationEasy
A truck travelling at 70 kilometres per hour uses 30% more diesel to travel a certain distance than it does when it travels at the speed of 50 kilometres per hour. If the truck can travel 19.5 kilometres on a litre of diesel at 50 kilometres per hour, how far can the truck travel on 10 litres of diesel at a speed of 70 kilometres per hour?
Answer & solution
- A
130
- B
140
150
- D
175
Solution
Given, that the truck can travel 19.5 kilometres on a litre of diesel at 50 kilometres per hour.
∴ At 50 km/hr, truck covers 19.5 km in 1 litre diesel.
∴ The truck will use 30% more diesel i.e., 1.3 litre diesel to cover 19.5 km at 70 km/hr.
∴ At 70 km/hr, in 10 litres of diesel, the truck will cover 19.5/1.3 × 10 = 150 km
Hence, option (c).