Math
posted by Timmy
A train that is one mile long starts through a tunnel that is also 1 mile long. the train is traveling 15 miles per hour. how long does it take for the train to get completely through the tunnel?

MathMate
The train is one mile long, and the tunnel is also one mile long.
Time begin:
When the head of the train begins to enter the tunnel.
Time end:
When the tail of the train leaves the tunnel, or when the head of the train is one mile away from the tunnel.
The train has travelled two miles between "time begin" and "time end".
Can you figure out the time required? 
mike
2 minutes
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