Answer:
r= 7.09 cm (3s.f.)
Step-by-step explanation:
[tex]\boxed{volume \: of \: cyinder = \pi {r}^{2}h }[/tex]
Given: h= 5cm, volume= 80cm³
πr²(5)= 80
Divide both sides by 5π:
[tex] {r}^{2} = \frac{80}{5\pi} [/tex]
Simplify:
[tex] {r}^{2} = 16\pi[/tex]
Square root both sides:
[tex]r = \sqrt{16\pi} [/tex]
r= 7.09 cm (3s.f.)
