The Renaissance Man

Dr. Johnnie Williams III BA, MS, DD

Solution to Train Cars and Bridge Riddle

I hope you guys were able to get the solution to this one without much thinking. It was pretty straight forward so the next one will increase in difficulty by one level. Here’s the answer:

The heaviest car goes first ( 11 tons ) and crosses the bridge in 12 minutes. The engine returns ( one minute ) and takes the 7-ton car across in eight minutes. It returns ( one minute )  and takes both the 5-and 2-ton cars across ( eight minutes ). That’s a total of 30 minutes.

 

I’m not really sure if this is the right answer since there was a discrepancy in my source. If you can calculate a smaller time please share it with me so I can share it with everyone. Good luck on the next one :-).

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August 25, 2010 - Posted by | Brain Teasers, Family, Games, Informational, Puzzles, Riddles, Updates | , , , , , , , ,

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