Multiple choice

Speed of boat along and against the current are 16km/h and 6km/h respectively, the speed of current is:

  1. 4 km/h

  2. 5 km/h

  3. 3 km/h

  4. 2 km/h

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Current speed is half the difference between downstream and upstream speeds. Downstream (boat + current) = 16 km/h, upstream (boat - current) = 6 km/h. Difference = 10 km/h, so current = 10 ÷ 2 = 5 km/h.

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