$2\mathrm{.}50$ An enclosed rectangular concrete vault with outside dimensions $2m1m1\mathrm{.}5m$ and wall thickness $10$ cm is buried with the top surface even with the ground surface. Will the vault tend to rise out of the ground if the ground becomes completely saturated with water? Use $S_{\text{c}\text{o}\text{n}\text{c}\text{r}\text{e}\text{t}\text{e}}=2\mathrm{.}4$