Use the formulas for a cylinder: r = 7 mm h = 4mm SA =

S. A = 483.87mm²

Step-by-step explanation:

Given parameters:

radius of the cylinder (r) = 7mm

height (h) = 4 mm

unknown is the surface area of the cylinder which is S. A

Solution

The surface area of a body is the total area covered by the outermost part of such a body. A cylinder has top and bottom circles with a trunk.

The surface Area of cylinder is given as = 2πrh + 2πr²

Now we slot in the appropriate parameters:

S. A = (2 x π x 7 x 4) + (2 x π x 7²)

S. A = (175.95 + 307.92) mm²

S. A = 483.87mm²