MGIMS WARDHA MGIMS WARDHA Solved Paper-2004

  • question_answer
    The length, breadth and thickness of a block are given by \[l=12\,\,\text{cm,}\,\text{b=6}\] cm, and t=2.45 cm- The volume of the block according to the idea of significant figures should be :

    A) \[1\times {{10}^{2}}c{{m}^{3}}\]                                 

    B) \[2\times {{10}^{2}}c{{m}^{3}}\]

    C) \[1.763\times {{10}^{2}}c{{m}^{3}}\]                                                

    D) none of the above

    Correct Answer: B

    Solution :

    Using the relation for volume \[V=length\times breadth\times thickness\] \[=12\times 6\times 2.45\] \[=176.4\text{ }c{{m}^{3}}\] \[=1.764\times {{10}^{2}}c{{m}^{3}}\] The minimum number of significant figures is 1 in breadth, hence, the volume will contain only one significant figure. Therefore,\[V=2\times {{10}^{2}}c{{m}^{3}}\]


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