Multiple choice general knowledge math & puzzles

If a boat is moving in upstream with velocity of 14 km/hr and goes downstream with a velocity of 40 km/hr, then what is the speed of the stream?

  1. 13 hm/hr

  2. 26 hm/hr

  3. 34 hm/hr

  4. none of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The speed of the stream is calculated as (Downstream Velocity - Upstream Velocity) / 2. Thus, (40 - 14) / 2 = 26 / 2 = 13 km/hr. Note: the option says 'hm/hr' which is a typo for 'km/hr'.