Question

A train $120$ metres long passes a tree in $5$ seconds. How long will it take to cross a railway platform $180$ metres long?

Answer 1

Speed of train$=\frac{120}{5}=24㎧$

To cross the railway platform total distance traveled

$=120+180=300m$

$\therefore$Time $=\frac{300}{24}=\frac{50}{4}=12.5s$