GATE Civil Engineering (CE) 2015 Shift 2 Solved Paper

A triangular gate with a base width of 2 m and a height of 1.5 m lies in a vertical plane. The top vertex of the gate is 1.5 m below the surface of a tank which contains oil of specific gravity 0.8. Considering the density of water and acceleration due to gravity to be 1000 kg/m³ and 9.81 m/s²
respectively, the hydrostatic force (in kN) exerted by the oil on the gate is _________________.