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| Math Central | Quandaries & Queries |
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Question from J: If a fly flies at 15 feet per a second between two walls closing in upon themselves. Wall A is moving to the right at 3 feet a second and wall B is moving to the left at 15 feet a minute, how far will the fly fly before the walls touch? |
Hi,
You didn't tell us how far apart the walls are when the process starts. Certainly the answer depends on this distance.
Suppose the walls are $d$ feet apart when the process starts. At what rate is the distance between the walls changing? How long will it take for this distance to decrease to zero?
Penny
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