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QUESTION

# How do I find the surface area of a sphere with a diameter of 14 cm?

First, look up for equation to calculate the surface area of a sphere, I've done that for you and included it below:

A = 4\pi r^2

You already know the diameter is 14cm, so to find the radius r you just divide the diameter by 2 to get r=7cm

Next, substitute this into the formula you have above:

A = 4\pi(7)^2 A = 4\pi(49)^2 A = 196picm^2

Now, you can optionally convert this to a numerical value by substituting in an actual value of pi (3.14159...), but for precision it's usually best to leave the surface area in terms of a multiple of pi.

The final numerical answer would be 615.75cm^2