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3 years ago

Help! Will give brainliest! (Whatever it’s called ) Thank you!! Find the surface area! :)

Mathematics

2 answers:

ladessa [460]3 years ago

8 0

Answer:

A=777.54

Step-by-step explanation:

What you do is use the formula which is

a=2pirh+2pir^2.

The radius is half the diameter and the diameter is 15 so you take 15 and divide it by 2 to get 7.5.

The height is 9 m.

A=2(3.14)(7.5)(9)+2(3.14)(7.5)^2=777.54 m.

Sever21 [200]3 years ago

7 0

Answer:

777.15 m^2

Step-by-step explanation:

To find the surface area of a cylinder

SA = 2 pi r h + 2 pi r^2

The area of the sides Plus the area of the top and bottom

We know the diameter is 15 so the radius is 1/2 (15) = 7.5

SA = 2 * pi * (7.5) * 9 + 2 * pi * (7.5)^2

= 135pi + 112.5pi

247.5 pi

Approximating pi with 3.14

247.5 (3.14)

777.15 m^2

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