Question

A car travels up a hill at a constant speed of 20 km/h and returns down the hill at a constant speed of 55 km/h. Calculate the average speed for the round trip

Answer 1

Answer: avg speed=Total speed/total time

Given: V1=20km/hr=5.55556m/s

V2=55km/hr=15.2778

total time =2hrs=7200 sec

Sol: Avg Speed=15.2778+5.55556/7200

avg. speed=15.2785716056m/s

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