Question

a bus is travelling at a speed of 90 km per hour at a straight line track the speed of the bus reduces to 90 kilometre per hour to 60 km per hour in 2 minutes calculate its average velocity.​

Answer 1

Answer:

Let the distance between P to Q be x

#Time taken in going from P to Q = x/60

#Time taken in going from Q to P =x/90

⇒ Average speed of bus = Total Distance travelled ÷ Total time taken = 2x/(x/60+x/90)

=72 km/hr

Hope it helps you