Situation 4: A vertical semi-circular gate AB blocks oil in the tank as shown. There is a 25 kPa pressure at the oil surface. The gate is hinged at point B. oil 25 kPa A 7 m B 6 m Determine the hydrostatic force acting on gate AB. 9. a. 0.257 N c. 988.8 kN b. 811.3 KN d. 1110 kN 10. Find the location of the said force from the oil surface. 11. a. 4.5 m b. 4.9 m c. 5.4 m d. 5.8 m Find the reaction of the roller at A. a. 235.43 KN c. 396.35 kN b. 253.34 kN d. 417.91 kN