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Mensa Brainteasers

Week 46 - Thursday

 

 

A 275 yard long train, travelling at 90 mph, enters a three mile long tunnel.

How many seconds will elapse between the moment the front of the train

enters the tunnel and the moment the end of the train clears the tunnel?

 

 

 

 

The answer to this puzzle will be revealed on 18.11.13

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18 Nov 2013
Reveal answer

126.25 seconds.