a car travels certain distance with a speed of 50kmh-¹ and returns with a speed of 40kmh-¹. calculate the average speed of whole journey
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Answer:
50 km/h
=50×1000/1×60×60
=125/9 m/s
40 km/h
=40×1000/1×60×60
=100/9 m/s
First Distance= 125m in 9s
Second Distance= 100m in 9s
Avg.Speed= total S/total T
=125+100/9+9 m /s
=225/18 m/s
=12.5 m/s
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