General
General
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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