a Boat covers a certain distance downstream in 2 hours while it come backs in twenty one by two hours if the speed of the stream is 3 km per hour what is the speed of the boat in still water
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speed downstream is x+3
speed upstream is x-3
so 2(x+3) = 21/2(x-3)
2x+6 = 21x/2 - 63/2
x = 4.117
speed upstream is x-3
so 2(x+3) = 21/2(x-3)
2x+6 = 21x/2 - 63/2
x = 4.117
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