Question

a solid hemisphere has a curved surface area of 175 cm square find its radius ​

Answer 1

Step-by-step explanation:

SOLUTION

curved surface area of hemisphere = 175 sq cm

let radius be r cm

Now

$\sf \: curved \: \: surface \: area \: = 175 \\ \sf \: \implies 2\pi {r}^{2} = 175 \\ \sf\implies {r}^{2} = \frac{175}{2\pi} \: \: \: \\ \sf \implies {r}^{2} = 27.84 \\ \sf \implies r = \sqrt{27.84} \\ \sf \: \implies \boxed{r = 5.276}$