Find the radius of a sphere whose surface area is 154 cm2.
Let the radius of the sphere be r.
Surface area of sphere = 154
∴ 4πr2 = 154 cm2
`r^2 = ((154xx7)/(4xx22))cm^2`
`r =(7/2)cm = 3.5cm`
Therefore, the radius of the sphere whose surface area is 154 cm2 is 3.5 cm.
Concept: Surface Area of a Sphere
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