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word problem

by sud21 » Wed Jan 25, 2012 7:35 pm
A person travelled from X to Y and arrived at Z. If the average speed in the whole trip is 15feet/second, what is the average speed during the route from Y to Z?
1) The average speed from X to Y is 10 feet per second
2) It took 20 seconds from Y to Z
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by MBACenter » Thu Jan 26, 2012 3:18 am
sud21 wrote:A person travelled from X to Y and arrived at Z. If the average speed in the whole trip is 15feet/second, what is the average speed during the route from Y to Z?
1) The average speed from X to Y is 10 feet per second
2) It took 20 seconds from Y to Z
Again, it's not clear what the problem is asking! Is Z in between X and Y or is Y between X and Z? What was the original answer? That would help shed some light on what the authors meant to ask.
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