The two ends of a metal rod are maintained at temperatures $100^\circ\text{C}$ and $110^\circ\text{C}$. The rate of heat flow in the rod is found to be $4.0\,\text{J}\,\text{s}^{-1}$. If the ends are maintained at temperatures $200^\circ\text{C}$ and $210^\circ\text{C}$, the rate of heat flow will be: