What is that answer to that math problem ?

1. x = 20

2. x = 5.25

3. x = 35

Step-by-step explanation:

Hope this helps!

12

step-by-step explanation:

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a