Physics

Problem

A tank open to the atmosphere initially contains 0.40 m of water. Oil of density

900\,\text{kg\,m}^{-3}

is poured on top until the gauge pressure at the original tank bottom increases by

15\,\text{kPa}

. Using

g=9.8\,\text{m\,s}^{-2}

, determine the depth of oil that must be added.