Largest radius of a coin that can float on water by surface tension

1. A.
   $\frac{T}{\rho g d}$
2. B.
   $\frac{4T}{3\rho g d}$
3. C.
   $\frac{3T}{4\rho g d}$
4. D.
   $\frac{2T}{\rho g d}$

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1. A.
   $\dfrac{4T}{3\rho gt}$
2. B.
   $\dfrac{4T}{\rho gt}$
3. C.
   $\dfrac{2T}{\rho gt}$
4. D.
   $\dfrac{T}{\rho gt}$

Tap an option to check your answer.