A hunter wishes to cross a river that is 1.6 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at the maximum speed of 11 km/h with respect to the water . What is the minimum time necessary for crossing ?

Answer 1

Min time will be to head directly across the river, but that puts him downstream due to river current. Now if he wanted to land directly across the river, that is another question.