Answers

2015-06-23T13:10:32+05:30
Radius = 31
angle = π/6
length of an arc = ??
     length =  π/6*360 * 2*22/7*31
            =  π/6*180*22/7*31
             = 1/π*6*180*22/7*31
           = 7/22*6*180*22/7*31
             = 6*180*31 = 33480

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2015-06-23T15:22:53+05:30
Length of arc = angle×radius
where angle is in radian

length= (π/6)×31 = 16.23
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