Question

Make r the subject of the formula: V = 4πr^2h ----------------------(r) SHOW WORKING

Answer 1

$V = 4\pi r^{2}h$

$\frac{V}{4\pi h}$ = $r^{2}$

r = $\sqrt{\frac{V}{4\pi h}}$

So first we leave r^2 alone. Therefore we divide both sides by 4pi h. Then to get r we square root both sides.