A 300 metre long train crosses a platform in 39 seconds while it crosses a signa

Question

A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

Options:

A . 320 m

B . 350 m

C . 370 m

D . Data inadequate

Answer: Option B

Speed = \(\left(\frac{300}{18}\right)m/sec = \frac{50}{3}m/sec.\)

Let the length of the platform be x metres.

Then, \(\left(\frac{x+300}{39}\right) = \frac{50}{3}\)

3(x + 300) = 1950

x = 350 m.

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