Multiple choice

A train $140$ m long passes a telegraph post in $14$ sec. Find its speed in km/hr .

  1. $36$ km/hr
  2. $56$ km/hr
  3. $44$ km/hr
  4. $51$ km/hr
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A Correct answer
Explanation

Speed = distance / time = 140 m / 14 sec = 10 m/sec. To convert m/sec to km/hr, multiply by 18/5: 10 * (18/5) = 36 km/hr.

AI explanation

Using the basic formula Speed = Distance / Time, the speed of the train is calculated as 140 m / 14 s = 10 m/s. To convert this speed from meters per second to kilometers per hour, we multiply by 18/5, which gives 10 * 18/5 = 36 km/hr. The speed of the train is 36 km/hr.

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