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NEET Sample Paper NEET Sample Test Paper-93

  • question_answer
    The density of a cube is measured by measuring its mass and length of its sides. If the maximum error in the measurement of mass and length are 4% and 3% respectively, the maximum error in the measurement of density will be

    A) 7%

    B)                    9%

    C) 12%                 

    D)        13%

    Correct Answer: D

    Solution :

    [d] Density\[\text{=}\frac{\text{Mass}}{\text{Volume}}\] \[\rho =\frac{M}{{{L}^{3}}},\]\[\,\,\,\,\frac{\Delta \rho }{\rho }=\frac{\Delta M}{M}+3\frac{\Delta L}{L}\] % error in density = % error in Mass + 3 (% error in length) =4+3(3) =13%


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