1) A motor boat covers a certain distance downstream in a river in five hours. It covers the same distance upstream in five hours and half. The speed of the water is 1.5 km/hr. The speed of the boat in still water is
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lets us say speed of boat is x
So speed of upstream will be x-1.5
Downstream will be x+1.5
since s = d/t
5(x+1.5) = 5.5 (x-1.5)
0.5x = 15.75
x = 31.5 km/hr
So speed of upstream will be x-1.5
Downstream will be x+1.5
since s = d/t
5(x+1.5) = 5.5 (x-1.5)
0.5x = 15.75
x = 31.5 km/hr
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