Math, asked by shreeyaramesh311, 29 days ago

Surface area of sphere is 616 the surface area of its hemisphere is

Answers

Answered by kanishettymamatha
0

Answer:

r≈7

A Surface area

616

Using the formula

A=4πr2

Solving forr

r=1

2A

π=1

2·616

π≈7.00141

Answered by lalnunkimahmarjoute
1

S.A \: of \: sphere = 616

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

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

 {r}^{2} = 154 \times  \frac{7}{22}

 {r}^{2} = 7 \times 7

r = 7

S.A \: of \: hemisphere  = 3\pi {r}^{2}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  = 3 \times  \frac{22}{7}  \times  {7}^{2}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 3 \times 22 \times 7

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 462

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