Aconical tank is resting on its apex. the height of the tank is 18 ft, and the radius of its top is 3 ft. 18) the tank is full of gasoline weighing 45 lb/f3. how much work will it take to pump the gasoline to a level 18 ft above the cone's top? give your answer to the nearest ft. lb. a) 68,707 ft lb b) 320,631 ft. lb c) 171,767 ft . lb 34,353 ft. lb