Answers

2014-03-10T14:58:52+05:30
Area= 2 pi r^2
15400=2*22/7 * r^2
2450=r^2
r=under soot 2450
now circumfece=
  2*22/7*under soort 2450
=311. something./
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2014-03-10T15:36:41+05:30
Πr² = 15400
22/7×r² = 15400
4904.5 = r²
70.03 = r

circumference = 2πr
                     = 2×3.14×70.03
                     = 439.8
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