A $300 \mathrm{~m}$ high cliff is where two water droplets fall freely one after the other. The first has already fallen $\frac{1}{1000} \mathrm{~mm}$ when the second begins its fall.

How far apart will the two droplets be at the moment when the first one reaches the base of the cliff? (The result should be calculated to the nearest $\frac{1}{10} \mathrm{~mm}$. Air resistance, etc., should not be considered.)