<PRE><B>Question 298319</B>
 Traveling 90 mph, it takes the Express Train six seconds for the entire train to enter a two-mile tunnel.
 How many seconds will it take the Express to completely travel through this tunnel?
:
find the length of the train: 6{{{90/3600}}}* .15 mi long
:
Time = dist/speed
Length of the train added to the tunnel dist: 2.15 mi
:
t = {{{2.15/90}}}*3600
t = 86 seconds
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