Question

Find the surface area for the given cylinder. Use 3.14 for pi and round to the nearest whole number.
904 yd^2
1,017 yd^2
1,130 yd^2
2,713 yd^2

Answer 1

@ritez @tafkas77

Answer 2

Cylinder surface area is = 2pir^2 + 2pirh=2pir( r + h)

Answer 3

To add on to what ritez said:

(h is the height of the cylinder, r is the radius of the top)

Surface Area = Areas of top and bottom +Area of the side

Surface Area = 2(Area of top) + (perimeter of top)* height

Surface Area = 2(pi r 2) + (2 pi r)* h

In words, the easiest way is to think of a can. The surface area is the areas of all the parts needed to cover the can. That's the top, the bottom, and the paper label that wraps around the middle.

You can find the area of the top (or the bottom). That's the formula for area of a circle (pi r2). Since there is both a top and a bottom, that gets multiplied by two.

The side is like the label of the can. If you peel it off and lay it flat it will be a rectangle. The area of a rectangle is the product of the two sides. One side is the height of the can, the other side is the perimeter of the circle, since the label wraps once around the can. So the area of the rectangle is (2 pi r)* h.

Add those two parts together and you have the formula for the surface area of a cylinder.

Surface Area = 2(pi r 2) + (2 pi r)* h

http://www.math.com/tables/geometry/surfareas.htm

Answer 4

ok so let me try this

Answer 5

so radius is 6 yards 2(3.14 6 2) + (2 3.14 6) x 24

Answer 6

i keep doing it wrong ritex said it was 1130 and i either get lower or higher than tht