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Airport race (Posted on 2002-12-05) Difficulty: 3 of 5
Xavier and Yonette are waiting for their plane at an airport, when Xavier proposes a race:

"See that moving sidewalk? Why don't you run on it, and then when you reach the end turn back and run to where you started from? I meanwhile will run the same path, but right next to it rather than on it."

Yonette thought about it and said:

"But I don't see the point... We both run with the same speed, and it's the same distance. Sure, I will gain a bit on you while the sidewalk increases my speed, but then I will just lose the advantage while I'm running back and we will arrive at the same time."

Assuming Xavier and Yonette do run with the same speed, who will win the race?

See The Solution Submitted by levik    
Rating: 3.5556 (9 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some More thought? | Comment 6 of 9 |
Well what if the sidewalk was going at such a speed that when Yonette runs he will get to one end, but on turning back the speed is more than his speed meaning that he would never make it to the starting point. Is this another way to think of it
  Posted by Dulanjana on 2002-12-09 02:56:56
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