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What will be the ratio of diameter of a hemisphere and the length of its circumference?

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What will be the ratio of diameter of a hemisphere and the length of its circumference?
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Let the radius of the hemisphere be r unit `therefore` its diameter =2r
Also the circumference of the hemisphere=`(pir+2r)` unit.
As per question , 2r:`(pir+2r)=2r:r(pi+2)=2:(pi+2)`
Hence the ratio=2:`(pi+2)`.
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