CBSE BOARD X, asked by rachael6, 1 year ago

hey can anyone help me with Q11

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Answered by Santosh1729
3

1 \div 4\pi {r }^{2}  = 2r + \pi.r \div 2 \\ solve \: this \: from \: here \: you \: will \: get \: radius \: then \: double \: it \: to \: get \: diameter

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