Boats & Streams · Question 18 · Easy
A boat goes 42 km upstream in 6 hours. Its downstream speed is 13 km/h. What is the speed of the stream?
- 10 km/h
- 3 km/h
- 2 km/h
- 6 km/h
Answer and explanation
Answer: B. 3 km/h
Explanation: Upstream speed = 42 ÷ 6 = 7 km/h. Stream speed = (13 − 7)/2 = 3 km/h.
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