A flask of volume ${10}^3\mathrm{cc}$ is completely filled with mercury at $0^0\mathrm{C}.$ The coefficient of cubical expansion of mercury is $180\times {10}^{-6}{/}^0\mathrm{C}$ and that of glass is $40\times {10}^{-6}{/}^0\mathrm{C}.$
If the flask is now placed in boiling water at ${100}^0\mathrm{C},$ how much mercury will overflow?

• A

  7 cc

• B

  14 cc

• C

  21 cc

• D

  28 cc