A man travels first 100m with a speed of 18 km/h and next 100 m with a speed of 36 km/h.The average speed of the man for whole journey is
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18+36/2=28
so the averagpe speed is 28km/h
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v1 = 18 km/h
v2 = 36 km/h
average v = v1+v2 /2
= 18+36/2
= 54/2
=27 km/h
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