The side area of a cylinder is 314 square centimeters, and its height is 20 centimeters. How many cubic decimeters is the volume of this cylinder

Bottom circumference = 314 / 20 = 15.7 cm
Bottom radius = 15.7 / (2 × 3.14) = 2.5cm
Bottom area = 3.14 × 2.5 × 2.5 = 19.625 square cm
Volume = 19.625 × 20 = 392.5 cubic centimeter = 0.3925 cubic decimeter

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