The surface area of a cylinder is equal to the sum of the areas of the bases each having an area of π⋅r2, plus the area of the side. The area of the side is equal to the area of a rectangle with length 2πr (the circumference of the base) times the height.
Substitute the values of the radius r=9 and height h=7 into the formula. Pi π is approximately equal to 3.14.
Simplify each term.
Raise 9 to the power of 2.
Multiply 81 by 2.
Multiply 9 by 2.
Multiply 7 by 18.
Add 162π and 126π.
Find the Surface Area cylinder (7sm)(9sm)