Question

The surface area of a sphere is 616 cm2. Its radius is 



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Answer 1

Hello!

Here is the answer for your question!

Question:-  The surface area of a sphere is 616 cm2. Its radius is

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Answer:-

• Given, surface area of sphere = 616 cm²

• Formula for surface area of sphere = 4πr²

substituting values,

                               4πr² = 616

                               4 × $\frac{22}{7}$ × r² = 616

                               88 × r² = 4312   (cross multiplication)

                               r² = $\frac{4312}{88}$

                               r² = 49

                                r = 7

• The radius of the sphere is 7cm

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Hope this helped you with your doubt :)    

Answer 2

given:-

surface area of a sphere =616cm²

To find:-

radius of sphere=?

Solution:-

surface area of sphere :-

$4\pi \: r {}^{2}$

surface area is given now we put value

$616 = 4\pi \: r {}^{2}$

$now \: take \: \pi = \frac{22}{7}$

equation we get

$616 = 4 \times \frac{22}{7} \times {r}^{2}$

616×7=22×4×r²

4312=88×r²

${r}^{2} = \frac{4312}{88}$

r²=49

r=7

radius of sphere is 7cm