A laboratory technician observes that a pressure sensor reads a gauge pressure of 80kPa when submerged in oil of density 800kg/m3. If the same sensor were submerged in freshwater (1000kg/m3) until it again read 80kPa gauge pressure, what would be the ratio hoil/hwater of the required depths?
(a) 0.80
(b) 1.56
(c) 1.25
(d) 1.00