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    Question

      A spherical metal ball of diameter 6 cm is melted and

    recast into 3 spherical balls. Two of these new balls have diameters of 3 cm and 4 cm. What is the diameter of the third ball?
    A 5cm Correct Answer Incorrect Answer
    B 2.5cm Correct Answer Incorrect Answer
    C 10cm Correct Answer Incorrect Answer
    D 7.5cm Correct Answer Incorrect Answer

    Solution

    r = 6/2=3cm. r1=3/2=3/2cm r2=4/2=2cm. Let the third sphere radius (r3) =x

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