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Zhejiang Education Press Junior 1 Math Exercise Book 1 P 19 and 20 4.4 Algebraic Expressions, the answer to the sixth question.
Single item:

Cylinder volume: ∏ r 2h, multiplied by 3.

Bottom area: ∏ r 2, multiplied by 2

Side area: 2∏rh, quantity: 2.

Polynomial:

Surface area of cylinder: 2 ∏ R 2+2 ∏ RH.

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