Two ends of a differential mercury manometer are connected at two points on a pipe carrying oil. The manometer shows difference in mercury level of 20 cm. The specific gravity of oil and mercury are 0.8 and 13.6, respectively. The density of water is 1000 kg m⁻³ at 4 °C and acceleration due to gravity (g) is 9.81 m s⁻². At the same two points in pipe, the difference of pressure in N m⁻² is