Question

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

Answer 1

Answer:

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

Step-by-step 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:

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

$\pi\approx3.14$

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