A motorboat went downstream for 28 km and immediately
returned. It took the boat twice time to make returned trip
than to go. If the speed of the river flow were twice as high,
the trip downstream and back would take 672 minutes. Find
the speed of the boat in still water and the speed of the river
flow.
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the answer is in the photo
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Answer:
2.5 km/h of stream
7.5km/h of boat
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