Question

A Train Running At Speed Of 120Km/Hr Crosses A Pole In 12Sec What Is The Length Of Train ?

Answer 1

speed =120km/hr
           =120 ×(1000/3600) m/s
           =100/3 m/s
now, distance = speed × time
                       =100/3×12 = 400 m
so, length of train = 400 m

Answer 2

please see the attachment.