SSC JE Mechanical 11 Oct 2023 Shift 2 Paper

An oil of specific gravity 0.8 is flowing through a pipe. A differential manometer is connected at the two points, say A and B, and shows a difference in the mercury level as 20 cm. What will be the difference between the pressures at the two points? Take density of mercury = 13600 kg/m³ and g = 10 m/s².