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12th Class Mathematics Sample Paper Maths Olympiad Model Paper-8

  • question_answer
    If the position vectors of P and Q are \[(i\text{ }+3j-7k)\] and \[\left( 5i-2j+4k \right),\] then \[|\overrightarrow{PQ}|\] is

    A)  \[\sqrt{158}\]               

    B)  \[\sqrt{160}\]

    C)  \[\sqrt{161}\]               

    D)  \[\sqrt{162}\]

    E)  None of these

    Correct Answer: D

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