If r is the radius of the disc, then pi*r2 square units.
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Surface area of a cylinder = (pi) x (diameter of the circular end) x (length)
surface area of right circular cylinder = 2 pi r h +2 pi r2
That gives you the surface area.That gives you the surface area.That gives you the surface area.That gives you the surface area.
surface area
The formula for the area of a rod, which is a cylinder, is given by A = 2πrh + 2πr^2, where A is the total surface area, r is the radius of the rod, and h is the length of the rod. The first term 2πrh represents the lateral surface area of the cylinder, which is the curved surface area, and the second term 2πr^2 represents the area of the two circular bases of the cylinder. By summing these two terms, we obtain the total surface area of the rod.