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    Easy

    Question


    In the figure, arc stack M N with hat on top has a length of 11.5. To the nearest integer, what is the value of x? 

    1. 660
    2. 550
    3. 630
    4. 330

    Hint:

    s = 2 π r (θ/360°)
    where,
    s=length of arc

    The correct answer is: 660

      s = 2 π r (θ/360°)------------(i)
      here,
      r=10
      s=11.5
      θ=x
      put these values in eq (i)
      11.5= 2*3.14*10 (x/360°)
      on solving,we get
      x=66

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