posted by Emily .
A hunter wishes to cross a river that is 1.6 km wide and that flows with a speed of 4.8 km/h. The hunter uses a small powerboat that moves at a maximum speed of 9.6 km/h with respect to the water. What is the minimum time necessary for crossing?
minimum time,head straight across.
timeacross= 1.6km/4.8km/hr=1/3 hr