The total weight, Wt$,$ is $22\mathrm{.}0$ lb$.$ The water content is $10\%,$ and the specific gravity of the soil, spg or Gs$,$ is $2\mathrm{.}58.$ All this mass is inside a container of $7"$x$7"$x$7".$ What is the weight of additional water $($lb$)$ to obtain $90\%$ of saturation?

Water density, gw $=62\mathrm{.}4$ pcf