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37 votes
37 votes
This is due tmr, need help, easy points x

This is due tmr, need help, easy points x-example-1
User KAD
by
2.8k points

2 Answers

28 votes
28 votes

Answer:

A = 1128π (approximately 3,543.72)

Explanation:

The formula for the surface area of a cylinder is:


A = 2\pi rh+2\pi r^(2)

r = 12

h = 35

Plug in the values:


A = 2\pi (12)(35)+2\pi (12)^(2)\\A = 2\pi (420)+2\pi (144)\\A = 840\pi +288\pi \\A = 1128\pi

User Clint Simon
by
2.6k points
9 votes
9 votes

Answer:

We are given a height and radius for a cylinder and we must determine what the surface area is. Surface area is the area that is showing all around the shape. So it would include the area of the top and bottom circles and also the entire strap around the cylinder. Using the equation below we can find the surface area.


S = 2\pi rh+2\pi r^2


S = 2\pi (12\ cm)(35 cm)+2\pi (12\ cm)^2


S = 840\ cm^2*\pi+288\ cm^2*\pi


S = 2,638.938\ cm^2+904.779\ cm^2


S = 3543.717\ cm^2

In the end, after inputting all of the values and solving, we get that the surface area for this cylinder is
3543.717\ cm^2

Hope this helps!

User Cperez
by
3.4k points