Sabarmati express takes 18 seconds to pass completely through a station 162 m long and 15 seconds through another station 120 m long. The length of the train is :

A. 132 m

B. 100 m

C. 80 m

D. 90 m

Answer: Option D

Solution(By Examveda Team)

Let length of the train be x m
Speed of train,
$$\frac{{{\text{x}} + 162}}{{18}} = \frac{{{\text{x}} + 120}}{{15}}$$
x = 90 m