Question

the surface area of sphere is 616cm2 then its radius is??​

Answer 1

Answer:

Hey Guy,

Step-by-step explanation:

surface area of sphere= 4pir²solve this,4×22/7×r²=61688/7×r²=61688×r²=4312r²=4312/88r²=49

surface area of sphere= 4pir²solve this,4×22/7×r²=61688/7×r²=61688×r²=4312r²=4312/88r²=49then r =7

Answer 2

Given ÷

Surface area of sphere = 616cm²

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Concept to find out...

Radius of sphere =???

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Solution-

$\color{red} \boxed{surface \: area \: of \: sphere \: = > 4\pi \: {r}^{2} }$

$616c {m}^{2} = > 4 \times 3.14 \times {r}^{2} \\ \\ 616c {m}^{2} = > 12.56 \times {r}^{2} \\ \\ \frac{616}{12.56} = > {r }^{2} \\ \\ {r}^{2} = > 49.04 \: or \: 49 \\ \\ r = > \sqrt{49 } \\ \\ \boxed{r = > 7}$

The radius of sphere => 7cm ..

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Other important formula .

✨ Surface area of cone => πrl

✨Surface area of cylinder =2πrh

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