$3\mathrm{.}49$ For the tank in Fig. P$3\mathrm{.}49,$ compute the depth of the oil if

the depth of the water is $2\mathrm{.}80$ m and the gage at the bottom

of the tank reads $52\mathrm{.}3$ kPa $($gage$).$

FIGURE P$3\mathrm{.}49$ Vented oil storage drum for

Problems $3\mathrm{.}49-3\mathrm{.}51.$