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On a shelf in the library, there is a 3 book set of almanacs labeled volume 1, volume 2 and volume 3. Each book is 2 1/2 inches thick, the pages being 2 inches thick and each cover is 1/4 inch thick. A bookworm starts eating it's way from the 1st page of volume 1 and stops at the last page of volume 3. How far did the bookworm travel?
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