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Two sphere of radius $R_1$ and $R_2$ have densities ${\rho _1}$ and  ${\rho _2}$ and specific heat $S_1$ and $S_2$ if they are heated to the same temperature the ratio of their rates of falling temperature will be
  • A$\frac{{{R_2}}}{{{R_1}}}$
  • B$\frac{{{R_1}{\rho _2}{S_2}}}{{{R_2}{\rho _1}{S_1}}}$
  • C$\frac{{{R_2}{\rho _2}{S_2}}}{{{R_1}{\rho _1}{S_1}}}$
  • D${\left( {\frac{{{R_1}}}{{{R_2}}}} \right)^2}$
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