If a circle and a sphere have the same radius, then CSA of sphere is times the area of the circle.

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Solution

The correct option is A 4
Let the radius of sphere and circle be r
Then Area of a circle = $π$ $r^{2}$
Surface area of sphere = 4 $π$ $r^{2}$
Hence, the surface area of the sphere is four times area of the circle.

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If a circle and a sphere have the same radius, then CSA of sphere is times the area of the circle.

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154 {cm}^{2}

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