Question

a train has a speed of 60 km per hour for the first hour and 40 km per hour for the next half hour find the average speed in kilometre per hour

Answer 1

Total Distance = 60 + 40/2 = 80 Km
Total Time = 1 + 0.5 = 1.5 hrs
Average Speed = 80/1.5 = 53.33 Km/hr

Answer 2

80/1.5 is right answer