A motor boat goes downstream in river covers the distance between tow coastal towns in 5 hours. It covers same distance upstream in six hours the speed of water is 2km\h find the speed of the motor boat in still water
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answer:
4x(+3)=5(x-3)
4x-12=-5x-15
4x-5x=-15-12
-x=-27
x=27
27 km/hr
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