8th Class Mental Ability Mensuration Question Bank Mensuration

  • question_answer
    The length of a cylindrical metallic tube is one meter. Its thickness is 1 cm and its internal diametre is 12 cm. Find the weight of the tube if the density of the metal is 7.7 gram per cubic cm.

    A) 32.67 kg             

    B)        33.84 kg

    C) 32.24 kg             

    D)                   31.46 kg

    E) None of these

    Correct Answer: D

    Solution :

    Explanation Option [d] is correct. Weight of \[1\,c{{m}^{3}}\] of metal \[=7.7\text{ }gram\] Volume of the tube = \[\frac{22}{7}\times 100\times 13\] Weight of the tube = \[\frac{22}{7}\times 100\times 13\times 7.7=31460\,gram\]


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