फाइंड द सर्किल फ्रेंड्स ऑफ सर्कल ऑफ रेडियस 30
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Radius of circle = 30 cm
The circumference of circle
circumference of circle = 2 πr
= 2 × 22/7 × 30cm
= 44/7 × 30cm
= 188.5 cm ²
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