A=2πr(r+h) make r the subject of formula
To make r the subject of the formula, we need to isolate r on one side of the equation.
First, expand the equation:
A = 2πr^2 + 2πrh
Now, rearrange the terms to isolate r:
2πr^2 + 2πrh = A
2πr^2 = A - 2πrh
r^2 = (A - 2πrh) / 2π
Finally, taking the square root of both sides to solve for r:
r = √((A - 2πrh) / 2π)