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The dimensions of a rectangular piece of paper is 21 cm \times 42 cm. It is folded to form a cylinder without overlapping. If the height of the cylinder is 21 cm, calculate the volume of the cylinder.
 
paper-155953_1280.png
 
The volume of the cylinder is  cm^3.
 
[Note: Consider the value of \pi as \frac{22}{7}]
 
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