a motor boat goes downstream and covers a distance in 4 hours while it covers the same distance upstream in 5 hours. if the speed of the stream is 3 km/hr,find the speed of the motor boat in still water
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Distance of downstream in a hour = x+ 3
Distance of upstream in a hour = x - 3
Distance of downstream in 4 hrs = 4x + 12
Distance of upstream in 5 hrs = 5x - 15
4x+12=5x-15
12+15=5x-4x
27 = x
Distance of upstream in a hour = x - 3
Distance of downstream in 4 hrs = 4x + 12
Distance of upstream in 5 hrs = 5x - 15
4x+12=5x-15
12+15=5x-4x
27 = x
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