Practice: Surface Areas of Cylinders

The diagram below shows the net of a cylinder where 𝐴𝐵𝐶𝐷 is a rectangle with 𝐴𝐵=20cm and 𝐴𝐷=44cm. The net is formed into a cylinder by joining 𝐴𝐵 with 𝐷𝐶, then folding over the two circles of radii 7 cm to make the top and the base.

What is the total surface area of the cylinder? Use 𝜋 as 227.


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