a car travels 100km with a velocity of 50 kmh-1 and then 120 km with a velocity of 40kmh-1 in the same direction.calculate the average vlocity of the car
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Explanation:
Total time for the journey, t=100/45=20/9 hrs
Time for first 50 km, t
1
=50/30=5/3 hr
So, time for remaining journey, t
2
=20/9−5/3=5/9 hrs
Speed for remaining journey v
2
=
5/9
50
=90 km/h
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