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NEET Sample Paper NEET Sample Test Paper-67

  • question_answer
    A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is \[0.6\text{ }gc{{m}^{-3}}\]. The mass of block is

    A) 706 g               

    B) 607 g

    C) 760 g               

    D) 670 g

    Correct Answer: C

    Solution :

    Weight of block = Weight of displaced oil + Weight of displaced water \[\Rightarrow \,\,mg={{V}_{1}}{{\rho }_{0}}g+{{V}_{2}}{{\rho }_{W}}g\,\] \[\operatorname{m}= \left( 10 \times  10 \times  6 \right) \times  0.6 + \left( 10 \times  10 \times  4 \right) \times  1\] \[\,=\,\,760\,g\]


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