trash bin surface area

Geometry Level 3

A trash bin made of tin metal has an upper diameter of 8 units, a lower diameter of 4 units, and an altitude of 12 units, as shown.

Find the surface area of the trash bin.

Note: Include the area of the bottom part. There is no top cover.

12 π 37 12\pi \sqrt{37} 241.0881 241.0881 4 π ( 3 37 + 1 ) 4\pi \big(3\sqrt{37}+1\big) 12 π 37 + 4 π 2 12\pi \sqrt{37} + 4\pi^2

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