A $1,000-$cm$3$ container was filled with a sand first in its loosest possible state and then in its densest possible state, and the weight of the sand was $1,520$ g and $1,830$ g$,$ respectively. The sand, in situ, had a void ratio of $0\mathrm{.}64.$ If the specific gravity of the sand particles is $2\mathrm{.}65,$ determine the relative density in situ.