Question

despeja b P= 2a + b
despeja r V= πr²h​

Answer 1

Explicación paso a paso:

$p = 2a + b \\ b = p - 2a \\ v = \pi {r}^{2} h \\ {r}^{2} = \frac{v}{h\pi} \\ \sqrt{ {r}^{2} } = \sqrt{ \frac{v}{h\pi} } \\ r = \sqrt{ \frac{v}{h\pi} }$