A man went downstream for 28 km in a motor boat and immediately returned. It took the man twice as long to make the return trip. 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. - Study24x7
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Vikram Singh
28 Mar 2019 10:02 AM study24x7 study24x7

 A man went downstream for 28 km in a motor boat and immediately returned. It took the man twice as long to make the return trip. 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...

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A

12 km/hr, 3 km/hr

B

9 km/hr, 3 km/hr

C

8 km/hr, 2 km/hr

D

9 km/hr, 6 km/hr

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