Question

# Total surface area of a cylinder of radius r and height h is 2πr2+4πrh2πr2+2πrh2πrh

Solution

## The correct option is B 2πr2+2πrhA cylinder has two circular flat surfaces and a curved surface. As r is the radius of the cylinder the area of a flat surface is πr2. Therefore, the area of two flat surfaces is 2×πr2=2πr2. The area of the curved surface is =2πr×h=2πrh as the height of the cylinder is h. Hence, the total surface area the cylinder is =2πr2+2πrh.

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