Question
Download Solution PDFA cyclist was riding alongside a railway track at a steady speed of 12 km/hr. A train running at a speed of 84 km/hr coming from behind the cyclist crosses him in 13.5 seconds. What is the length of the train?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF∵ The train and cyclist are moving in the same direction,
Relative speed = 84 – 12 = 72 km/hr. = 72 × 5/18 = 20 m/sec.
Now, time taken to cross cyclist = Length of train/relative speed
⇒ 13.5 = Length of train/20
∴ Length of train = 20 × 13.5 = 270 m
Last updated on Jul 8, 2025
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