Question

12. The speed of a motor boat with respect to water is v = 14 m/s. The speed of water with respect to the banks is 6 m/s. When the boat began travelling upstream, a buoy was dropped from it. A buoy is a body that can float in water. The boat travelled 6.3 km upstream (with respect to banks), turned about and caught up with the buoy. Find the time T lapsed between dropping the buoy and catching up with it again.