<PRE><B>Question 883601</B>
A train is traveling at a constant rate. If it passes through a 360 meter long tunnel, it takes 16 seconds. If the train passes over a 1.2 kilometre bridge, it takes 40 seconds. How long is the train?
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let x=length of train
speed=distance/travel time (equal for both tunnel and bridge)
distance=length of train plus length of tunnel or bridge
{{{(360+x)/16=(1200+x)/40}}}
40(360+x)=16(1200+x)
14400+40x=19200+16x
24x=4800
x=200
length of train=200 m</PRE>