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?
Answer & explanation
Correct answer: option 2
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