Multiple choice

Speed of a train is $36$ km per hour. If it passes a tree in six seconds, then the length of the train is

  1. $30$ m
  2. $50$ m
  3. $60$ m
  4. $90$ m
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C Correct answer
Explanation

Speed = 36 km/hr = 10 m/s. Distance = Speed * Time = 10 m/s * 6 s = 60 m.

AI explanation

First, convert the train's speed of 36 km/hr to m/s using the conversion factor of 5/18, which gives 10 m/s. Since passing a tree only requires covering its own length, the train's length is its speed multiplied by the time taken. Therefore, multiplying 10 m/s by 6 seconds gives a train length of 60 m.

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