The surface area of a sphere is 616 sq cm. Find its radius. [Use π =

1.	The surface area of a sphere is 616 sq cm. Find its radius. [Use π = 22/7]
Answer» The surface area of sphere = 616cm² Since, the surface area of sphere = 4πr² Therefore, \(4\pi r^2 = 616\) \(4\times\frac{22}{7}\times r^2= 616\) \(r^2=616\times\frac74\times\frac1{22}\) r² = 49 r = 7 cm ∴ Required radius, r = 7cm

The surface area of a sphere is 616 sq cm. Find its radius. [Use π = 22/7]

Answer»

The surface area of sphere = 616cm²

Since, the surface area of sphere = 4πr²

Therefore,

\(4\pi r^2 = 616\)

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

\(r^2=616\times\frac74\times\frac1{22}\)

r² = 49

r = 7 cm

∴ Required radius, r = 7cm

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The surface area of a sphere is 616 sq cm. Find its radius. [Use π = 22/7]

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