<PRE><B>Question 303991</B>
The distance the train has to travel to get out of the tunnel is = length of train + length of tunnel

let length of train be x feet

x+1320 = total distance it travels

speed = x+1320/45

when crossing a pole speed = x/15

speeds at both the times are same

x/15 = x+1320/45

45x=15(x+1320)

45x=15x+19800

30x= 19800

x= 19800/30

660 feet is the length of the train

Ananth</PRE>