A spherical drop of liquid splits into 1000 identical spherical drops. If u_i is the surface energy of the original drop and u_f is the total surface…

A spherical drop of liquid splits into $\displaystyle 1000$ identical spherical drops. If $\displaystyle \mathrm{u}_{\mathrm{i}}$ is the surface energy of the original drop and $\displaystyle \mathrm{u}_{\mathrm{f}}$ is the total surface energy of the resulting drops, the (ignoring evaporation), $\displaystyle \frac{u_f}{u_i}=\left(\frac{10}{x}\right)$. Then value of $\displaystyle x$ is $\displaystyle \_\_\_\_$: