a car travels a certain distance with a speed of 50 km/h and returns with a speed of 40km/h .calculate the average speed of the whole journey.
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speed in outward journey = 50 km/h
speed in inward journey = 40 km/h
hence average speed in total journey = (50+40)/2
= 90/2 = 45
= 45 km/h
speed in inward journey = 40 km/h
hence average speed in total journey = (50+40)/2
= 90/2 = 45
= 45 km/h
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