Help on a Problem!! Hi there everyone. I am completely lost on how to go about answering this question A sunbather, drifting down the Grand River on an inner-tube, dives off the tube as it passes under the high bridge of Elora Gorge. She swims against the current for 15 mins before turning and swimming downstream with the same effort (ie: same speed relative to the water). When she finally reaches her tube, she is 1.0 km downstream from the high bridge. What is the current of the water? If anyone can help solve this question it would help A LOT!!