A boy covers 40m in 10s, 30m in next 10s and 20m in last 10s .Calculate the average speed of the boy in km/h. solved
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Answer:
10.8km/hr
Explanation:
avg speed = (40+30+20)/30
=90/30=3m/s
in km/hr
3*18/5=10.8km/hr
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