a man travels by boat 36 km upstream and complete the distance in 8 hours. if speed of boat in still water is 12km / hour then find the speed of the strfeam
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let x is the speed of boat in still water is 12km/he
speed = 36 | x
time (in hr)= 8 | 12
It is direct case
36*12
8x
36*12/8x
x=36*12/8 =27
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