A car starts at a speed of 80 km/hr with its speed increasing by 8 km/h every two hours. In how many hours will it cover 432 km?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 5 hours
Distance = speed × time
Distance covered by the car in first two hours = 80 × 2 = 160 km
Distance covered by the car in the next two hours = 88 × 2 =176 km
Remaining distance = 432 - (160 + 176) = 96 km
Distance covered by the car in next one hour = 96 × 1 = 96 km
Total covered distance in five hours = 160 + 176 + 96 = 432 km