Question

A train moving at a speed of $45km/h$ crosses a platform of length $400m$ in $44s$. Find the length of the train.

Answer 1

Let 'l' be the length of train.

Given, $44=\frac{400+l}{45\times \frac{5}{18}}$

$\Rightarrow 44\times 45\times 5=7200+18l$

$\Rightarrow \frac{2700}{18}=l$

$\therefore l=150m$.