Question

11. The surface area of a sphere is 1386 cm². Find the radius of the sphere. (2018) (1) 11.5 cm (2) 10.5 cm (3) 8.5 cm (4) 10.25 cm. where are you ┐(´(エ)｀)┌
I'm bored
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Surface area of a sphere = 4πr2

⇒ 4πr2 = 1386

⇒ 4 × (22/7) × r2 = 1386

⇒ r = 21/2 cm

Volume of a sphere = (4/3)πr3

⇒ (4/3) × (22/7) × (21/2)3

⇒ 4851 cm3

∴ The volume of the sphere is 4851 cm3.

Step-by-step explanation:

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