skipper

85/2.8=30.36 secs. to travel straight across. in the time he would have end up (30.36 x 1.6) = 48.57 m. downstream so now you can sketch a right triangle, 85 m. north/south, south 48.57 m. "upstream" on the far bank. (a) angle to row = 48.57/85 = 0.57 deg...