The time required for an elevator to lift a weight varies directly        with the weight and the distance through which it is to be lifted          and inversely as the power of the motor. If it takes 20 seconds        for a 5 hp motor to lift 50 lbs through 40 ft, what weight can an        80 hp motor lift through a distance of 40 ft within 30 seconds?        A. 1000 lbs C. 1500 lbs       B. 1800 lbs D. 1200 lbs

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