A boat travels 20 km upstream in 5 hours and 20 km downstream in 2 hours. What is the speed of the current?
✓ Correct Answer: Option A
Upstream speed = 4 km/h. Downstream speed = 10 km/h. Current = (10−4)/2 = 3 km/h.
Upstream speed = 4 km/h. Downstream speed = 10 km/h. Current = (10−4)/2 = 3 km/h.