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Thanks Curtis, this is useful information. So if you have a rectangular slab to remove you multiply the length times the width, both in feet, by the thickness in inches and then by 12.5 to estimate the weight in pounds. If you measured the thickness in feet also then, since there are 12 inches in a foot you are estimating the density of concrete as 12 ×12.5 = 150 pounds per cubic foot. So back to your original question. Your cylinder has a radius of 56/2 = 28 inches and a depth of 24 inches. Converting these to feet the radius is 28/12 = 2.33 feet and a depth of 24/12 = 2 feet. The volume of a cylinder is π × radius^{2} × height so the volume is
At 150 pounds per cubic foot that's 34.21 × 150 = 5131.3 pounds. An even easier way to find the volume is to use our volume calculator. Harley  


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