A boat goes 12 km downstream in 2 hours and returns upstream in 4 hours. What is the speed of the stream?
A1.5 km/h
B2.0 km/h
C2.5 km/h
D3.0 km/h
Explanation
Downstream speed = 12 / 2 = 6 km/h. Upstream speed = 12 / 4 = 3 km/h. Stream speed = (Downstream – Upstream) / 2 = (6 – 3) / 2 = 1.5 km/h.
Exam Relevance
- Topic: Speed, Time & Distance
- Subtopic: Boats and Streams
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