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a cockroach is trapped in a trash compactor whose walls are 100 meters apart. Thr walls of the compactor begin to close in on the cockroach at a speed of 1 meter per hour. Sensing doom, the cockroach panics and runs from one of the walls that is closing in to the opposite wall, over and over and over until eventually, squish. The cockroach runs at a speed fo 20 meters per hour, and starts at one of the walls. how much distance does the cockroach run before he does? assume that r2-d2 does not care about cockroaches.

I feel like this is simple algebra?

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    Is each wall moving at 1 M/hr, or is the distance between the walls decreasing at 1 M/hr?2012-11-26
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    Please, try to make the title of your question more informative. E.g., *Why does $a imply $a+c?* is much more useful for other users than *A question about inequality.* From [How can I ask a good question?](http://meta.math.stackexchange.com/a/589/): *Make your title as descriptive as possible. In many cases one can actually phrase the title as the question, at least in such a way so as to be comprehensible to an expert reader.*2012-11-26

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