Question

use the net to find the approximate surface area of the cylinder to the nearest square meter. Please help I dont get it ):

Answer 1

please explain.

Answer 2

A=2πrh+2πr2
r= radius
h=height

Answer 3

2*3.14*5*9+2*3.14*5*5

Answer 4

For the surface area of the cylinder, you need to add the area of the circular bottom and circular top. Then you need to add the area of the big rectangle. The big rectangle bends to form the sides of the can or cylinder.
Circle area = pi x 5^2 and there are two of these
For the length of the rectangle, it would be the circumference of the circle x 9.
Circumference of circle is 2(pi)(5). Multiple that by 9.
When you add everything up, you get 2(pi)(5)^2 + (9)(2)(pi)(5).
Do you see how I got that?
Now simplify it to get 50 pi + 90 pi = 140 pi m^2 for the total surface area.

Answer 5

140 times pi = 440 square meters

Answer 6

thank you for explaining!