a bus travels the first half of its root at an average speed of 20 km per hour if its average speed for the entire trip was 24 km per hour calculate the average speed of the bus for the second half of its root.
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Answer:
average speed == total distance/total time taken
== 20+20+20=60k/m
total time taken==1+0.5==2.5h
thus average speed of bus is 60/2.5= 24km/h
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