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JEE Main & Advanced Mathematics Vector Algebra Question Bank Modulus of vector Algebra of vectors

  • question_answer
    The magnitudes of mutually perpendicular forces a, b and c are 2, 10 and 11 respectively. Then the magnitude of its resultant is                                                                                                     [IIT 1984]

    A) 12          

    B) 15

    C) 9             

    D) None

    Correct Answer: B

    Solution :

    \[R=\sqrt{4+100+121}=15.\]


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