A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 14 sec.

A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 14 sec. What is the length of the platform?

Answer/Solution

535.71 m

Steps/Work

Speed = 300/14= 150/7 m/sec.
Let the length of the platform be x meters.
Then, (x + 300)/39 = 150/7
=> x = 535.71 m.
Answer:D