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NTSE Sample Paper NTSE SAT Practice Test-9

  • question_answer
    A raft of wood (density 600 kg/\[{{m}^{3}}\]) of mass 120 kg floats in water. How much weight can be put on the raft to make it "just sink"?

    A) 40 kg                            

    B) 80 kg

    C) 120 kg                          

    D) 200 kg

    Correct Answer: B

    Solution :

    [b] Volume of raft of wood \[=\frac{120}{600}\] = 0.2 cm3 Weight of water displaced \[=\text{ }0.2\times {{10}^{3\text{ }}}\times g\] = 200 kg wt Mass of water displaced = 200 kg So, additional mass that can be added \[=\left( 200-120 \right)kg\] =80 kg


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