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A 144-m long wire of radius 4 mm is melt...

A 144-m long wire of radius 4 mm is melted to form a sphere. What is the surface area (in `cm^2`) of the sphere, assuming there is no wastage of material ?

A

400 `pi`

B

676 `pi`

C

576 `pi`

D

484 `pi`

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