28. a man can row downstream 20km in 2 hrs, and upstream 4km in 2 hrs. What is speed of rowing in still water?
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distance (d) = 20+4
=24m
time (t) = 2+4
= 8s
speed (v) = distance /time
= 24/8
= 3m/s
=24m
time (t) = 2+4
= 8s
speed (v) = distance /time
= 24/8
= 3m/s
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