Abdul, while driving to school, computes the average speed for his trip to be 20 km/h. On his return trip along the same route, there is less traffic and the average speed is 30 km/h. What is the average speed for Abdul’s trip?
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Answer:
First speed = 20km/h
Second speed ,= 30 km/h
Average speed= 20+30/2=50/2=25km/h
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