RAJASTHAN PMT Rajasthan - PMT Solved Paper-2006

  • question_answer
    The length, breadth and thickness of a block are given by \[l\]= 12cm. b = 6 cm and t = 2.45 cm. The volume of the block according 10 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 these

    Correct Answer: B

    Solution :

    Using the relation for volume                 \[V=\]length\[\times \]breadth\[\times \]thickness                       \[=12\times 6\times 2.45\]                 \[=176.4\,\,c{{m}^{3}}\]                 \[=1.764\times {{10}^{2}}\,\,c{{m}^{3}}\] 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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