A drop of liquid of density \( \rho \) is floating half immersed in a liquid of density \( \sigm...

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A drop of liquid of density \( \rho \) is floating half immersed in a liquid of density \( \sigma \) and surface tension \( 7.5 \times 10^{-4} \mathrm{Ncm}^{-1} \).
The radius of drop in \( \mathrm{cm} \) will be : (Take \( : \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2} \) )
(a) \( \frac{15}{\sqrt{2 \rho-\sigma}} \)
(b) \( \frac{15}{\sqrt{\rho-\sigma}} \)
(c) \( \frac{3}{2 \sqrt{\rho-\sigma}} \)
(d) \( \frac{3}{20 \sqrt{2 \rho-\sigma}} \)
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