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A 270 m long train is running at 81 km/hr. How much time will it take to cross a 225 m long platform?
- a)18 sec
- b)21 sec
- c)22 sec
- d)24 sec
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A 270 m long train is running at 81 km/hr. How much time will it take ...
Here Speed of train = 81 km/hour
Most Upvoted Answer
A 270 m long train is running at 81 km/hr. How much time will it take ...
To calculate the time it takes for the train to cross the platform, we need to determine the relative speed between the train and the platform.
Given:
Length of the train = 270 m
Speed of the train = 81 km/hr
Length of the platform = 225 m
Converting the speed of the train from km/hr to m/s:
81 km/hr = (81 * 1000) m/3600 s = 225/10 m/s = 22.5 m/s
Calculating the relative speed:
Relative speed = Speed of the train - Speed of the platform
Relative speed = 22.5 m/s - 0 m/s (since the platform is stationary)
Relative speed = 22.5 m/s
To calculate the time taken to cross the platform, we divide the total distance (length of the train + length of the platform) by the relative speed.
Total distance = Length of the train + Length of the platform
Total distance = 270 m + 225 m
Total distance = 495 m
Time taken = Total distance / Relative speed
Time taken = 495 m / 22.5 m/s
Time taken = 22 sec
Therefore, it will take 22 seconds for the train to cross the 225 m long platform.
Hence, the correct answer is option C) 22 sec.
Given:
Length of the train = 270 m
Speed of the train = 81 km/hr
Length of the platform = 225 m
Converting the speed of the train from km/hr to m/s:
81 km/hr = (81 * 1000) m/3600 s = 225/10 m/s = 22.5 m/s
Calculating the relative speed:
Relative speed = Speed of the train - Speed of the platform
Relative speed = 22.5 m/s - 0 m/s (since the platform is stationary)
Relative speed = 22.5 m/s
To calculate the time taken to cross the platform, we divide the total distance (length of the train + length of the platform) by the relative speed.
Total distance = Length of the train + Length of the platform
Total distance = 270 m + 225 m
Total distance = 495 m
Time taken = Total distance / Relative speed
Time taken = 495 m / 22.5 m/s
Time taken = 22 sec
Therefore, it will take 22 seconds for the train to cross the 225 m long platform.
Hence, the correct answer is option C) 22 sec.
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A 270 m long train is running at 81 km/hr. How much time will it take ...
22 sec
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A 270 m long train is running at 81 km/hr. How much time will it take to cross a 225 m long platform?a)18 secb)21 secc)22 secd)24 secCorrect answer is option 'C'. Can you explain this answer? for Class 8 2026 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about A 270 m long train is running at 81 km/hr. How much time will it take to cross a 225 m long platform?a)18 secb)21 secc)22 secd)24 secCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 8 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 270 m long train is running at 81 km/hr. How much time will it take to cross a 225 m long platform?a)18 secb)21 secc)22 secd)24 secCorrect answer is option 'C'. Can you explain this answer?.
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