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A train is running at a speed of 40 km/hr and it crosses a post in 18 seconds. What is the length of the train?
  • a)
    190 metres
  • b)
    160 metres
  • c)
    200 metres
  • d)
    120 metres
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
A train is running at a speed of 40 km/hr and it crosses a post in 18 ...
To find the length of the train, we can use the formula:

Length of train = Speed × Time

Given:
Speed of the train = 40 km/hr
Time taken to cross the post = 18 seconds

Converting the speed from km/hr to m/s:
We know that 1 km/hr = 5/18 m/s

So, the speed of the train in m/s = (40 × 5/18) m/s = 200/18 m/s = 100/9 m/s

Calculating the length of the train:
Length of train = (100/9) × 18
Length of train = 1800/9
Length of train = 200 meters

Therefore, the length of the train is 200 meters, which is option C.
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Community Answer
A train is running at a speed of 40 km/hr and it crosses a post in 18 ...
First of all covert speed km /hr in mins. by multiply 40 from 5/18. then multiply speed with time. 100/9×18=200
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A train is running at a speed of 40 km/hr and it crosses a post in 18 seconds. What is the length of the train?a)190 metresb)160 metresc)200 metresd)120 metresCorrect answer is option 'C'. Can you explain this answer?
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