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From my Boing engineer friend: Hello Bob, The volume of a cylinder (or any regular solid) is the product of its area and its length. In this case the cross-sectional area is 6ft * 6ft * 3.14 = 113 sq ft. If the length is 20 ft, then the volume is 20ft * 113 sq ft = 2260 cubic ft. There are...

Here's a quick math problem, which will be easy for some of you: Yesterday I saw a huge plastic tank laying on its side on a flatbed truck, maybe for underground water storage. The shape was like a 55-gal drum, except it was 12' in diameter and 20' long. How would you calculate how many...