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3 सेमी. त्रिज्या वाले वृत्त की परिधि तथा उसके क्षेत्रफल का अनुपात ज्ञात करें?

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3 सेमी. त्रिज्या वाले वृत्त की परिधि तथा उसके क्षेत्रफल का अनुपात ज्ञात करें?
A. `1:3`
B. `2:3`
C. `2:9`
D. `3:2`
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1 Answer

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Correct Answer - B
`("Circumference")/("Area")=(2pir)/(pir^(2))`
`=2/r=2/3`
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