Posted by Micka on Sunday, October 9, 2011 at 6:08pm.
A train that is 1 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 out of the tunnel?

Math  Steve, Monday, October 10, 2011 at 5:42am
It takes 1/15 hour for the engine to enter and leave the tunnel
When the engine is leaving, the caboose is entering, and also takes 1/15 hour to pass through the tunnel.
Answer is 1/15 + 1/15 = 8 minutes.

Math  Taylor Sykes, Tuesday, September 6, 2016 at 5:36pm
8 minutes
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