Question

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

Answer 1

speed = 300/18 = 50/3 m/s

let Length of the platform be x m

then (x + 300)/39 = 50/3

3(x + 300) = 1950

3x + 900 = 1950

3x = 1950 - 900

x = 1050/3

x = 350