Question

A train 400 m long crosses a pole in 18 sec. What is the speed of the train in km/hr?​

Answer 1

$s = \frac{d}{t}$

so, 400÷18

=22.2

answer= 22.2km/hr

Answer 2

Step-by-step explanation:

$speed = \frac{distance}{time} \\ \: \: \: = \frac{400}{18} \\ km \: per \: hour \: = (speed \times \frac{18}{5} ) \\ = \frac{400}{18} \times \frac{18}{5} = 80 \: km \: per \: hr \:$I hope it satisfied u :)