Question

Find the radius of a sphere whose surface area is 308cm? 1​

Answer 1

Answer:

9.89

Step-by-step explanation:

Area of a circle = πr²

Radius = Area/π

Hence , 308/3.14

r² = 98

r = √98 = 9.89

Answer 2

Answer: r=$\sqrt{77/2}$ is the radius of sphere

Step-by-step explanation:

Given that the surface area of sphere=308cm

surface area of sphere=4πr^2

We have to find the radius of sphere,

4πr^2=308

πr^2=308/4

πr^2=77

r^2=77/(22/7)

r^2=77/2

r=$\sqrt{77/2}$

Hence, we get the solution r=$\sqrt{77/2}$ is the radius of sphere