h=7smr=9sm

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.

2π⋅(radius)2+2π⋅(radius)⋅(height)

Substitute the values of the radius r=9 and height h=7 into the formula. Pi π is approximately equal to 3.14.

2(π)(9)2+2(π)(9)(7)

Raise 9 to the power of 2.

2π⋅81+2(π)(9)(7)

Multiply 81 by 2.

162π+2(π)(9)(7)

Multiply 9 by 2.

162π+18π⋅7

Multiply 7 by 18.

162π+126π

162π+126π

Add 162π and 126π.

288π(sm)2

Find the Surface Area cylinder (7sm)(9sm)