Question

Despejar r de  V=a+b/2 πr2
ayudaa​

Answer 1

$v = \frac{(a + b)\pi {r}^{2} }{2}$

${r}^{2} = \frac{2v}{(a + b)\pi}$

$r = \sqrt{ \frac{2v}{(a + b)\pi} }$