plz answer fast plz
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let the distance between A and B =S
so ATQ ...
. AB=S=BA
average speed = total time / total distance
where,
total distance = AB +BA
= S+S =2S
total time = S/30 +S/20
= 20S/60+30S/60
=50S/60
hence average speed
= 2S/50S/60
= 2S/50S×60/50S
= 60/25
= 2.4 km/h
hope it help you...........
good night
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Answer:
I think 24km okay thanks
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