A boat goes 100 km downstream in 10 hours, and 75 Km upstream in 15 hours. The speed of the stream is________?
Q1. A boat goes 100 km downstream in 10 hours, and 75 Km upstream in 15 hours. The speed of the stream is________?
Answer: 2 (1/2) km/h
Explanation: Downstream speed = 100/10 = 10 km/h; upstream speed = 75/15 = 5 km/h. Stream speed = (10−5)/2 = 2.5 km/h.