Question

S=2πr^2+2πrh

Answer 1

what is your question?

Answer 2

this is the surface area of a cyllinder

Answer 3

S=2πr^2+2πrh for H

Answer 4

\[2\pi r^2\]

this comes from the sides that are circles soo these ones

each is a circle with radius r


area of one circle is \[\pi r^2\]

so two is equal to \[2\pi r^2\]

now for the second part it's much easier to figure it out by thinking of the cyllinder part as a flat piece of paper rolled up