h=7.4r=7

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=7 and height h=7.4 into the formula. Pi π is approximately equal to 3.14.

2(π)(7)2+2(π)(7)(7.4)

Raise 7 to the power of 2.

2π⋅49+2(π)(7)(7.4)

Multiply 49 by 2.

98π+2(π)(7)(7.4)

Multiply 7 by 2.

98π+14π⋅7.4

Multiply 14π⋅7.4.

Multiply 7.4 by 14.

98π+103.6π

Multiply 103.6 by π.

98π+325.46899891

98π+325.46899891

98π+325.46899891

Add 98π and 325.46899891.

633.34507896

Find the Surface Area cylinder (7.4)(7)