Question

A train of length 60 metres is moving with a constant speed 20 metre per second calculate the time taken by the train to cross and electric pole and a bridge of length 300 metres​

Answer 1

time = (300+60)/2 = 360/20 =180s

Answer 2

Total distance required for the train to cross the bridge is,

d = (300 + 60) m = 360 m

Hence the time taken to cross the bridge is,

t = 360 / 20 = 18 s.