Question

the surface area of sphere is 616 cm2 find its radius

Answer 1

Hey mate ..
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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

Hope it helps !!!

Answer 2

as we know area of circle pie rsquare
so 22/7×r^2=616
r^2=616-22/7
r=square root of4290/7
r=9.35.