ArithmeticQuestion 382 of 550

A boat moves downstream at 20 km/h and upstream at 12 km/h. What is the speed of the boat in still water?

  1. 16 km/h
  2. 8 km/h
  3. 4 km/h
  4. 32 km/h
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Correct answer: 16 km/h

The speed in still water is the mean of the two speeds = (20 + 12) ÷ 2 = 16 km/h.

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Questions last reviewed: 21 October 2026