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A train of length 350 meters can cross a pole and platform of a certain length in 21 seconds and 36 seconds respectively, then what is the length of the platform?
- a)200 meters
- b)250 meters
- c)350 meters
- d)300 meters
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
A train of length 350 meters can cross a pole and platform of a certa...
Let the length of the platform and speed of train be x m and y km/h respectively.
According to the question:
y = 60 km/h
And,
x = 250 meters
Hence, the correct option is (B).
Most Upvoted Answer
A train of length 350 meters can cross a pole and platform of a certa...
Given data:
- Length of the train = 350 meters
- Time taken to cross a pole = 21 seconds
- Time taken to cross a platform = 36 seconds
Calculating the speed of the train:
- When the train crosses a pole, it covers its own length = 350 meters in 21 seconds
- Therefore, the speed of the train = 350/21 = 16.67 m/s
Calculating the length of the platform:
- When the train crosses a platform, it covers the length of the train and the platform together
- The time taken to cross the platform is 36 seconds
- So, the distance covered in 36 seconds = speed * time = 16.67 * 36 = 600 meters
- Since the train is 350 meters long, the remaining distance is the length of the platform
- Therefore, the length of the platform = 600 - 350 = 250 meters
Therefore, the length of the platform is 250 meters, which is option B.
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A train of length 350 meters can cross a pole and platform of a certain length in 21 seconds and 36 seconds respectively, then what is the length of the platform?a)200 metersb)250 metersc)350 metersd)300 metersCorrect answer is option 'B'. Can you explain this answer?
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