average speed from A to B is 20 km/hr. average speed from B to A is 30 km/hr. what is the aberage speed of the tital trip ?
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Average Speed = Total Distance/ Total Time
Distance = Speed x Time
Let’s say the Distance between A and B is x
Time(A-B) = x/20 kmph = x/20 hr
Time(B-A) = x/30 kmph = x/30 hr
Total Time = (50/600)x hr
Total Distance = 2x
Average Speed = (2x)/[(50/600)(x)] =1200/50 kmph = 24 kmph
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