Boats & Streams · Question 19 · Easy

A swimmer covers 2 km downstream in 15 minutes. If the current flows at 2 km/h, what is the swimmer's speed in still water?

  1. 8 km/h
  2. 4 km/h
  3. 10 km/h
  4. 6 km/h
Answer and explanation

Answer: D. 6 km/h

Explanation: Downstream speed = 2 ÷ (1/4) = 8 km/h. Still-water speed = 8 − 2 = 6 km/h.

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