A boat is rowed downstream at 15.5km/hr and upstream at 8.5 km/hr. The speed of the stream is________?
Q1. A boat is rowed downstream at 15.5km/hr and upstream at 8.5 km/hr. The speed of the stream is________?
Answer: 3.5km/hr
Explanation: Stream speed = (downstream − upstream) / 2 = (15.5 − 8.5) / 2 = 3.5 km/hr.