speed of a boat is still water is xkm/h the speed of the boat upstream when the speed of current is 4km/h is
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speed of a boat is still water is xkm/h the speed of the boat upstream when the speed of current is 4km/h is
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Speed of boat in still water = x km/hr
Speed of boat upstream
= Speed of boat - Speed of stream
= x - 4
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