Question

The distance between two places is 120 km. A car travelling at a certain speed can cover the distance in 2 hours 30 minutes . By how many km/h should the speed of the car be increased for it take 30 minutes less to cover the distance?​

Answer 1

Answer:

12 km/h

Step-by-step explanation:

The speed with which the car travels to cover 120 km in 2 and half hours = d/t

=120/2.5 = 48 km/h

To take 30 minutes lesser, car has to travel within 2 hrs.

Therefore, speed required = d/t = 120/2 = 60 km/h

Therefore, the speed of the car has to be increased by 12 km/h to take 30 minutes lesser to reach the destination.

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