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## Baseball Seams, Pipe Connections, and World Travels

We have established that the length of the seam on a baseball is 10.99 times the radius of the ball and that the length of the groove on a tennis ball is 9.39 times its radius. Very interesting. What else can we get out of our lengthy analysis?

This is a good question. We are now going to look at two problems that have nothing to do with a baseball but everything to do with the mathematics we developed in analyzing a baseball. The first problem is quite a practical one in civil engineering; the second problem deals with some aspects of cartography and geography.

### A Nice Way to Connect Pipes

Here's the engineering problem. We have a deep well (or indeed an array of wells) penetrating a ground ...

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