Multiple choice

A railway passenger counts the telegraph posts on the line as he passes them while travelling. If the poles are $50$ m apart and the train is going at the speed of $48$ km/hr How many posts will be passed by the train per minute ?

  1. $16$
  2. $17$
  3. $18$
  4. $20$
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A Correct answer
AI explanation

The speed of 48 kilometers per hour converts to 48000 meters per 3600 seconds, giving a speed of 80 meters every 60 seconds or one minute. Since the telegraph poles are 50 meters apart, dividing 80 meters by 50 meters shows the train passes 1.6 intervals in one minute, meaning it passes exactly 16 posts in that time.

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