Raju walks to his school which is at a distance of 7.5 Km from his home in 1 hour. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 30 minutes. His average speed in Km/h is?
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1
speed = Distance/time
= 7.5 *60 km/h
30
= 15 km/h
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Answer:
distance-7.5km
goes to school at speed-60min.
on coming the same distance -7.5km
come to school at speed-30km
average speed=total distance travelled/total time taken
average speed=7.5*2/60+30
average speed=15/90=0.166=0.17(approx)
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