Question

A train 120m long passes a telegraph post in 10 seconds find the speed of the train in (a) km/hr. (b)m/min.​

Answer 1

Explanation:

speed = ?

distance =120 m

t=10 sec

speed= distance / time

= 120m/10= 12 m/s

converting 12m/s to km/h= (12/1 ÷1000/60*60)km/h= 12* 60*60/1000=43.2 km/h

converting 12m/s to m/m= (12 *60)m/min= 720 m/min