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September 20, 2014

September 20, 2014

Posted by **Micka** on Sunday, October 9, 2011 at 6:08pm.

- Math -
**Steve**, Monday, October 10, 2011 at 5:42amIt 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.

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