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From A to B (Posted on 2002-05-15) Difficulty: 5 of 5
A car drives downhill with the speed of 90 m/h. On a level road, the same car goes 72 m/h, and uphill it goes "only" 60 m/h.

It takes this car 5 hours to go from town A to town B. The return trip only takes 4 hours.

Find the distance between the two towns.

See The Solution Submitted by levik    
Rating: 3.8667 (15 votes)

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Some Thoughts Not so hard | Comment 12 of 14 |

Great question! I just did it (without looking at the answers) and I liked it. But I do not think it deserves the difficulity 5 of 5 status. There are many approaches to this question, from pure algebra to logical thinking, and that makes it quite easy. I think it should be more a difficulity 3 of 5 question. (at least not higher)

-David


  Posted by David Johnson on 2007-01-15 23:52:11
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