A man can row 30 km downstream and return in a total of 8 hours. If the speed of the boat in still water is four times the speed of the current, then tehe speed of the current is
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distance d = (30) 4
= 120 km
time t = 8 h
speed v = d/t
= 120/8
=15m/s
= 120 km
time t = 8 h
speed v = d/t
= 120/8
=15m/s
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