The area of a rectangle can be calculated by multiplying one side length by another side length (or in other words, length and width). Since a square is also a rectangle, to find the area, we need to multiply 11 by 11, which is 121.
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The work area of 11 by 13 is 143.
The area is 1,520.53 inches2
Assuming that the cylinder has no end caps then the surface area, A = 2πrh Substituting the given dimensions then A = 2π x 11 x 11 = 760.27 in² (2dp). If there are end caps then one these has an area of πr² so together they have an area of 2πr² = 2π x 11² = 760.27........so the combined area = 1520.54 in²
A circle with a radius of 11 inches has an area of 380.13 square inches.
Area of the circle: pi*11^2 = 121*pi square units