Question

A train 800 m. long is running at 36 km./hr. If it crosses a tunnel in 2 minutes, the length of a train is,
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Answer 1

Answer:

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Step-by-step explanation:

Let the length of the tunnel be 'x' m

Time (in mins.) = (Length of train + Length of tunnel) / speed

[speed in m/s = 36×5/18 = 10m/s ]

∴, 120 min = (800 + x) / (10)

120×10 = 800 + x

1200 = 800 + x

x = 1200 - 800

x = 400 m

So, answer is 400 meters