Question

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

Answer 1

Let the length of the train be $x$ meters

$\therefore$ $\frac{x+162}{18}=\frac{x+120}{15}$

$\Rightarrow 15(x+162)=18(x+120)$

$\therefore$ $x=90m$.