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NTSE Sample Paper NTSE SAT Practice Test-13

  • question_answer
    The number of solid spheres each of diameter 12 cm which can be moulded to from a solid cylinder of height 72 cm and radius 4 cm , is 

    A) 4         

    B) 6

    C) 8                                 

    D) 12

    Correct Answer: A

    Solution :

    [a] Number of solid spheres \[=\frac{Volume\text{ }of\text{ }the\text{ }cylinder}{Volume\text{ }of\text{ }the\text{ }sphere}\] \[=\frac{\pi \times {{4}^{2}}\times 72}{\frac{4}{3}\pi {{.6}^{3}}}=4.\]                      


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