Question

Jack knows the surface area of a cylinder and its radius. He wants to find the cylinder's height. He needs to rewrite the formula a=2$\pi$ r (r+h) to find the cylinder's height (h) in terms of the cylinder’s surface area (A) and its radius (r). Which is the correct formula?
a) h = r + $\frac{a}{2 \pi r}$ 
b) h = $\frac{a}{2 \pi r}$
c) h = $\frac{a}{2 \pi r} - r^{2}$
d) h = $\frac{a}{2 \pi r} - r$

Answer 1

Maybe is the answer C