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FENCE MEANS CIRCUMFERENCE(PERIMETER)
C=2pie r
C=2×22/7×21
=11×3
=33m
cost of rope =Rs.4
=33×4
=Rs.132
C=2pie r
C=2×22/7×21
=11×3
=33m
cost of rope =Rs.4
=33×4
=Rs.132
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