A triangles hypotenuse?

Question

Bridgett is making a cylinder-shaped container to store her coins. The container has a base on one end and an opening on the other end. She is going to spray paint the container. The container has a diameter of 2 inches and a height of 18 inches.

What is the surface area of the container?

Use 3.14 for​ π .

Enter your answer, as a decimal, in the box.

 in²

Answer 1

You can use the formula for the surface area of a Cylinder keeping in mind that one end is open so instead of

2πr² + 2πrh

Since one end is open you will only need πr² not 2πr² the radius is half the diameter so the radius is 1 inch.

The Surface area for this situation becomes

πr² + 2πrh

Give it a try

Using 3.14 for π I got 116.18 in²

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