A person rows upstream a distance of 55 km in 5 hours and rows downstream a distance of 75 km in 3 hours. How much time will he take to row a distance of 96 km in still water?

5 hours 20 minutes

Let the speed of boat and current be x and y.

= x - y = \(\frac{55}{5}\) = 11 km/hr

= x + y = \(\frac{75}{3}\) = 25 km/hr

= 2x = 36 km/hr

= x = 18 km/hr

Time = \(\frac{96}{18}\)= 5 hours 20 minutes