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NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
    A body weights w in air and it loses its weight by 25% in water. The relative density of the body is:

    A)  4                   

    B)  \[1/4\]

    C)  \[3/4\]                         

    D)  \[4/3\]

    Correct Answer: A

    Solution :

        As relatvie density = Specific gravity and   \[RD=\frac{\text{weight of body in air }}{(\text{weight of the body in air}-\text{weight of the body in water)}}\]                    \[=\frac{{{w}_{a}}}{{{w}_{a}}-{{w}_{w}}}-\frac{{{w}_{a}}}{\Delta w}=\frac{{{w}_{a}}}{{{w}_{a}}/4}\] (Since weight of the body decreases by 25% of its original weight, \[{{w}_{a}}\] (weight in air) \[\Rightarrow \]               \[RD=4\]          


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