The circumference of the bottom surface of a cylinder is 6.28dm, the bottom area of the cylinder is [1]. The side area is. The volume is

Perimeter L = π d = 6.28
Diameter d = 2
Radius r = D / 2 = 1
Bottom area s = π * r * r = 3.14
Side area = L * H = 12.56
Volume v = s * H = 6.28
That's all

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