Larry C. answered • 02/12/19

Computer Science and Mathematics professional

If x is the time rowing upstream, then 4-x is the time downstream. Since the distance each way is the same:

5x = 11(4-x) -> 5x = 44-11x -> 16x = 44 -> x = 2.75

5*2.75 = 13.75 so he rowed 13.75 miles each way or 27.5 miles in all.