Question

please tell me step by step if tell correct answer I will mark u as brainlist and I will give thanks for your all answers . no spam​

Answer 1

Answer:

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Step-by-step explanation:

Given surface area sphere =154 sq cm

Then 4πr²

=154

⇒4×  22/7

×r²=154  

⇒r²  =22×4/154×7

​  

=12.25

⇒r=3.5cm  

So the radius is 3.5 cm

Answer 2

surface area of sphere = 154 cm^2

4πr^2 = 154 cm^2

$4 \times \frac{22}{7} \times {r}^{2} = 154$

4 x 22 x r^2 = 154 x 7

88 x r^2 = 1078

${r}^{2} = \frac{1078}{88} = 12.25$

r = √12.25

r = 3.5 cm

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