Boats & Streams · Question 7 · Medium
Boats & Streams question 7
A man takes twice as long to row a distance upstream as to row the same distance downstream. What is the ratio of his speed in still water to the speed of the stream?
- 3 : 1
- 1 : 3
- 3 : 2
- 2 : 1
Answer and explanation
Answer: A. 3 : 1
Explanation: If downstream speed is twice upstream: b + s = 2(b − s), so b = 3s. Ratio b : s = 3 : 1.
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