A few days ago
roxygal602

Can Someone Help Me With This Math Problem??

FInd the total surface area of a cylinder with radius 3 and height 8. (Leave answer in pie form)

Top 2 Answers
A few days ago
Sport Dude

Favorite Answer

66 pi for the same reasons as the other person, but the other person forgot to multiply the circumference by the height to get 48 pi plus 18 pi instead of 6 pi plus 18 pi.
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A few days ago
friedrich
In order to find the total surface area of a cylinder, you can break a cylinder into a rectangle (where the label on a soup can would be) and two circles (the top and the bottom).

Circles:

Finding the area is simple. Pi * radius squared

The radius is 3. When you square it, you get 9.

Each circle’s area is 9pi. When you have two circles – one for each base, you get 18pi.

Rectangle:

The height is given. It is 8.

The length is the circumference of the base. Like a soup can’s label, which wraps around the can, the circumference is the same as the length. Circumference is 2*radius*pi.

2*3*pi = 6pi

Now you need to add the numbers of the circles and the rectangle. 6pi + 18pi = 24pi

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