Question

Question 2

Answer 1

Answer:

The surface area of the cylinder is $\mathbf{70\pi\;\textbf{cm}^2}$

Step-by-step explanation:

The surface area of a cylinder is express

  $S=2\pi rh$

where $r$ is the radius of the cylinder and $h$ its height

Therefore, if the radius of the cylinder is

  $r=5\;\text{cm}$

and its height

  $h=7\;\text{cm}$

the surface area should be

  $S=2\pi r h\\S=2\pi (5\;\text{cm})(7\;\text{cm}) \;\;\;\;\;\Rightarrow\;\;\;\;\; \mathbf{S=70\pi\;\textbf{cm}^2}$