Question 818457
1 km/hr

1 km = 1000 m
1 hour = 3600 seconds

1000/3600  m/s
=5/18 m/s

40 km/h = 40 *(5/18) m/s

length of train = distance traveled to cross the pole

d= speed * time

=40 *(5/18)*27

20*5*3

=300 meters