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A spherical ball of lead 6 cm in radius ...

A spherical ball of lead 6 cm in radius is melted and recast into three spherical balls. The radii of two of these balls are 3cm and 4 cm. What is the radius of the third sphere ?

A

4.5 cm

B

5 cm

C

6 cm

D

7 cm

Text Solution

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The correct Answer is:
B
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