A road 3.5m wide surrounds a circular plot whose circumference is 44m. Find the cost of paving the road at ₹10 per m²
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In ΔOPQ,
∠OPQ+∠PQO+∠QOP=180
0
∠60
0
+60
0
+∠QOP=180
0
∠QOP=180
0
−120
0
∠QOP=60
0
We get third angles is 60
0
and it is equilateral triangle.
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