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NEET Sample Paper NEET Sample Test Paper-91

  • question_answer
    A boat is sent across a river with a velocity of \[8\,\,km\,{{h}^{-1}}.\] If the resultant velocity of boat is \[10\,\,km\,{{h}^{-1}},\] then the velocity of the river is

    A) \[12.8\,\,km\,{{h}^{-1}}\]        

    B)        \[6\,\,km\,{{h}^{-1}}\]

    C) \[8\,\,km\,{{h}^{-1}}\] 

    D)        \[10\,\,km\,{{h}^{-1}}\]

    Correct Answer: B

    Solution :

    [b] \[{{v}_{r}}=\sqrt{{{v}_{R}}^{2}-v_{B}^{2}}=\sqrt{{{10}^{2}}-{{8}^{2}}}=6\,\,km\,{{h}^{-1}}\]


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