Question
Download Solution PDFA train passes a platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km per hour, what is the length of the platform?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Speed of the train = 54 km/h
Time taken to pass the platform = 36 seconds
Time taken to pass a man = 20 seconds
Formula Used:
Length of the train = Speed × Time taken to pass a man
Length of the platform = Speed × Time taken to pass the platform - Length of the train
Calculation:
Speed in m/s = 54 × (1000 / 3600) = 15 m/s
Length of the train = 15 × 20 = 300 m
Length of the platform = 15 × 36 - 300
⇒ Length of the platform = 540 - 300
⇒ Length of the platform = 240 m
The correct answer is option 2.
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