area of a circleis 154 cm² .find its circumference
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Area = 154 cm²
πr² = 154 cm²
22/7×r² = 154 cm²
r² = 154 cm²×7/22
r² = 49 cm²
r = 7 cm
Circumference = 2πr
= 2×22/7×7 cm
= 44 cm
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