Question

what is the surface area of a cylinder with a radius of 2m and height of 9m?

Answer 1

We have the next formula in order to calculate the surface area

$SA=2\pi r^2+2\pi rh$

where

r=2m

h=9

we substitute the values

$SA=(2)(3.1416)(2^2)+2(3.1416)(2)(9)=138.23m^2$

the answer is 138.23m^2