Solve A=2(pi)r^2+2(pi)rh, for r>0

Answer 1

If by "solve for r" you mean isolate r in terms of all other variables and constants, the answer is

it cannot be done.

Answer 2

This is the formula for the surface area of a can or cylinder of height h and radius r

The area A = 2 times the area of the circular top & bottom, plus the circumference times the height

A=2pir^2 (the top & bottom areas) + Ch (circumference = 2pir)