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A motorboat goes downstream in a river and covers the distance between two coastal towns in five hours it covers this distance upstream in six hours if the

speed of the stream is 2km/h, find the speed of the boat in still water



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Let the speed of boat in still water be "x" km/hr and the distance between the two coastal towns be "d" km.
 \frac{d}{x+2} = 5

 \frac{d}{x-2} = 6

x = 22 km/hr
2 5 2
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