An oil tank is in the shape of a right-circular cylinder with a radius of r meters and its axis is horizontal. If the tank is half full of oil having mass density 750 kg per cubic meter, find r if the total force on one end of the tank due to liquid pressure is 80000 N. O a. None of the choices. O b. 2.5 meters O c. 3.5 meters Od. 1.5 meters O e. 4.5 meters

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