एक मीटर लम्बे तार के बने वृत का क्षेत्रफल ज्ञात करो ?
(a)796 cm (b) 798cm (c)799 cm
Answers
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(a)796 cm²
Length = circumference
2πr = 100 cm
r = 50/π
Area = π r²
Area = π (50/π)²
Area = 2500/π
Area ≈ 796 cm²
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