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NTSE Sample Paper NTSE SAT Practice Test-15

  • question_answer
    12 spherical solid balls of the same size are made from melting a solid cylinder of 16 cm diameter and height 2 cm. The diameter of each spherical ball is

    A) \[\sqrt{3}\] cm   

    B)        2cm

    C) 3 cm                            

    D) 4 cm

    Correct Answer: D

    Solution :

    [d] Let x cm be the radius. \[\Rightarrow \]Volume of the cylinder = volume of 12 balls \[\Rightarrow \,\pi {{.8}^{2}}.2=12\times \frac{4}{3}\,\pi .{{x}^{3}}\] \[\Rightarrow x=2\]cm.


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