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A boat goes 3 km upstream and 44 km downstream in 10 hours. In 13 hours it can go 40km upstream and 50 km downstream. Determine the speed of the stream and that of the boat in still water. |
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Answer» Step-by-step EXPLANATION: LET X be speed of BOAT in still WATER and Y be speed of stream downstream = (x+y)km/hr upstream =(x-y)km/hr TIME = DIST/SPEED ATGC-1 TIME UPSTREAM=3/X-Y TIME DOWNSTREAM = 44/X+Y 3/X-Y + 44/X+Y = 10 |
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