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P, Q and R are three towns on a river wh...

P, Q and R are three towns on a river which flows uniformly. Q is equidistant from P and R. I row from P to Q and back in 10 hours and I can row from P to R in 4 hours. Compare the speed of my boat in still water with that of the river. a. `4:3` b. `5:3` c. `6:5` d. `\ 7:3`

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