Question

Find the surface area of the cylinder to the nearest tenth of a square unit. ​

Answer 1

`\large\boxed{412\ cm^2}`

Explanation:

Th formula of a Surface Area of a cylinder:

`S.A.=2\pi r(r+H)`

We have r =4cm and H = 12.4cm. Substitute:

`S.A.=2\pi(4)(4+12.4)=8\pi(16.4)=131.2\pi\ cm^2`

`\pi\approx3.14`

`V\approx(131.2)(3.14)=411.968\ cm^2\approx412\ cm^2`