Question

tje surface area of sphere is 616cmsq. find the radius​

Answer 1

Answer:

$surface \: area \: of \: sphere = 616 \: {cm}^{2} \\ \\ \therefore \: 4 \pi \: {r}^{2} = 616 \\ \\ \therefore \: 4 \times \frac{22}{7} \: {r}^{2} = 616 \\ \\ \therefore \: {r}^{2} = 616 \times \frac{7}{4 \times 22} \\ \\ \therefore \: {r}^{2} = 616 \times \frac{7}{88} \\ \\ \therefore \: {r}^{2} = 7 \times 7\\ \\ \therefore \: {r}^{2} = 49\\ \\ \therefore \: {r} = \sqrt{49} \\ \\ \: \huge \purple{ \boxed{\therefore \: {r} = 7 \: cm}}$

Thus, the radius of the sphere is 7 cm.