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# Surface Area

A spherical balloon is inflated until its volume becomes 27 times its original volume. How much does its surface area increase?

What is the surface area of a cylinder with radius \( 4 \) and height \( 6 \)?

**Note:** The above figure is not drawn to scale.

**Note:** The above figure is not drawn to scale.

**Note:** The above figures are not drawn to scale.

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