Can someone me with this surface area of cylinder problem. i thought i had it but i didn't, i've gotten from my teacher but i still don't get it. make it as simple as you can.

This is the formula for the surface area where r is the radius and h is the height. Finding the surface area will determine how much wrapping paper Jill needs (in inches squared).

The base measures 4 inches across. This means that the diameter is 4 inches. The radius is half the diameter (always). Thus, the radius is 2 inches. This means that r=2

The height is 10 inches. This means that h=10

The questions says to use 3.14 for π.



Use a calculator for this. Doing this by hand will take a painful amount of time.



This was what I got from a calculator. I did not round at all.

The surface area is 150.72 inches squared. Thus, Jill will need 150.72 inches squared of wrapping paper. I hope this is what you needed to help you understand! :)

If you have a iphone the new measure app can you with that