Expand the side of a cylinder to get a square with side length of 6.28 decimeters. The volume of the cylinder is () cubic decimeters A. 2B. 2πC. 19.7192
2 × 6.28, = 3.14 × 1 × 6.28, = 19.7192 (cubic decimeter), answer: the volume of the cylinder is 19.7192 cubic decimeter; so choose: C
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