Total distance is 120 km . Going by 60kmph and coming back by
40kmph what is the average speed?
Answer Posted / guest
Given total distance already ie equal to 120km
T1 = (120/2) / 60 = 1 hr
T2 = (120/2) / 40 = 1.5 hr
Total time T = 2.5 hr
Average speed = 120 / 2.5
= 48 kmph
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