Raju walks to his school at a distance of 6 km with constant speed of 2.5
km/hour and walks back with a constant speed of 4 km/hour. What is his average
speed.
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Step-by-step explanation:
time to go to school= 60/25=2.4
time to come back6/4=1.5
average speed= total distance/ total time
= 12/3.9 in km/ hour
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