Question

the surface area of a sphere is 616 cm2 . find its radius​

Answer 1

Answer:

7cm

Step-by-step explanation:

The surface area of sphere =616cm

2

Since, the surface area of sphere =4πr

2

Therefore,

4πr

2

=616

πr

2

=154

r

2

=49

r=7cm

Hence, the radius of the sphere is 7cm.

Answer 2

r = 7cm

Step-by-step explanation:

========

Given,

Surface area of the sphere = 616cm^2

Radius of the sphere, r = ?

we know,

Surface area of the sphere = 4 πr^2

=> 616 = 4 πr^2

=> 616 / 4 = 22 / 7 × r^2

=> 154 = 22 / 7 × r^2

=> 154 × 7 / 22 = r^2

=> 7 × 7 = r^2

=> \sqrt{49} = r

•°• r = 7 cm

Thus,

The required radius of the sphere is 7cm