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). A steamer,going downstream in a river, covers the distance between two towns in 20 hours. Coming backupstream, it covers this distance in 25 hours. The speed of water is 4 km/h. Find the distance betweernthe two towns.Hint. First find the speed of the steamer in still water.]

Answer»

Is is maths or physics?

Let the speed of the boat be 'x' kmph. then the speed in downstream will be = (x+4)kmph. the speed in upstream will be=(x-4) kmph. . now we have ,20(x+4)=25(x-4). 20x+80=25x-100 80+100=25x-20x. 180=5x. x=180/5 . x=36



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