Question

A car travels 20 km at a uniform speed of 40 km per hour and the next 40 km at uniform speed of 20 km per hour find the average speed of the car.​

Answer 1

Answer:

Time taken by the car to travel first 20km=20/40=1/2hrs.

Time taken by the car to travel another 20km=20/60=1/3hrs

Total time=1/2+1/3=5/6hrs

Average speed=total distance/total time

=40/5/6=48km/hr