It'd be best if you were able to write this whole question symbolically.
If you want to write it verbally, please use parentheses:
V = 2pir to the second h ought to be V = 2*pi*r^2 *h, and you are to solve for h. You could also write V =2(pi)(r^2)(h), which would be clearer still.
If you want a formula for h, then please divide both sides of this equation by
2(pi)(r^2).
V
Result: h = -----------------
2(pi)(r^2)
