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A boat goes 4 km upstream and 4 km downstream in 1 hour. The same boat goes 5 km downstream and 3 km upstream in 55 minutes. What is the speed (in km/hr) of boat in still water?
- A6.5
- B7.75
- C9
- D10.5
Answer not set
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CCommunity
Hello, 7.75 is correct