Julie and Eric row their boat at a constant speed 55 miles d

Julie and Eric row their boat (at a constant speed) 55 miles downstream for 5 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 11 hours. Find the rate of the current.

55/5=11 MPH IS THE SPEED DOWNSTREAM.
55/11=5 MPH IS THE SPEED UPSTREAM.
(11-5)/2=16/2=8 MPH IS THE BOAT SPEED IN STILL WATER.
PROOF.
8+3=11 MPH. FOR THE CURRENT DOWN STREAM
8-3=5 MPH. DITTO.