Multiple choice

A boy runs a distance of $16$ km in $ 1\cfrac{1}{3}$ hrs, find his speed in m/sec.

  1. $ 1\cfrac{2}{3} $ m/sec
  2. $ 2\cfrac{2}{3} $ m/sec
  3. $ 3\cfrac{1}{3} $ m/sec
  4. $ 5\cfrac{2}{3} $ m/sec
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The distance is 16 km, which is 16000 meters. The time is 4/3 hours, which is (4/3) * 3600 = 4800 seconds. Speed = distance / time = 16000 / 4800 = 160 / 48 = 10 / 3 = 3 1/3 m/sec.

AI explanation

The total distance traveled by the boy is 16 km and the total time taken is 4/3 hours. Using the formula speed equals distance divided by time, the speed in km/hr is 16 divided by 4/3, which equals 12 km/hr. To convert this speed to m/sec, we multiply by 5/18. This gives 12 multiplied by 5/18, which equals 10/3 m/sec or 3 and 1/3 m/sec.

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