Multiple choice

How much time does it take to cover a distance of $660$ m at a speed of $72$ km/hr.

  1. $33$ sec
  2. $22$ sec
  3. $14$ sec
  4. $12$ sec
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A Correct answer
Explanation

Speed = 72 km/hr = 72 * (5/18) m/s = 20 m/s. Time = Distance / Speed = 660 / 20 = 33 seconds.

AI explanation

Convert the speed from km/hr to m/sec by multiplying 72 by 5/18, which makes the speed 20 m/sec. Using the Time formula (Time = Distance divided by Speed), divide the distance of 660 m by 20 m/sec to get 33 seconds. The result is 33 sec.

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