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Find the radius of a sphere whose surface area is 154 cm².

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Detailed Solution

Given, Surface area of the sphere = 154

Let the radius of the sphere be r.

We know that formula to find the surface area of the sphere = 4πr²

Using formula, 4πr²= 154

r²= (154×7)/(4×22) = (49/4)

r = (7/2) = 3.5

The radius of the sphere is 3.5 cm.

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