The diameter of the bottom surface of an open tin bucket is 3 decimeters, and the height is 4 decimeters. How many square decimeters of tin is needed to make such a bucket
The bottom radius of the bucket is 3 / 2 = 1.5dm, the bottom area is 1.5 square x3.14 = 7.065dm2, the bottom perimeter is 3x3.14 = 9.42cm, and the side area is 9.42x4 = 37.68dm2
So the surface area is 37.68 + 7.065 = 44.745dm2
Making such a bucket requires at least 44.745dm2 of iron sheet
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