Three solid metallic spheres whose radii are 1cm, x cm and 8 cm, are m – McqOptions

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1.	Three solid metallic spheres whose radii are 1cm, x cm and 8 cm, are melted and recast into a single solid sphere of diameter 18 cm. The surface area (in cm2) of the sphere with radius x cm is∶
A.	144π
B.	64π
C.	100π
D.	72π
Answer» B. 64π

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