Question

Solve for h in the mathematical formula SA = 2πr2 + 2πrh

Answer 1

SA=2πr^2+2πrh  which is equal to:

SA=2πr(r+h)  divide both sides by (2πr)

r+h=SA/(2πr)  subtract r from both sides

h=SA/(2πr)-r  or if you prefer

h=(SA-2πr^2)/(2πr)

Answer 2

SA = 2πr (r+h)
SA / 2πr = r + h
h = (SA - 2πr^2) / 2πr