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The number of cars manufactured on an assembly line varies jointly as the number of workers and the time they work. If 200 workers can produce 64 cars in 2 hours, find how many cars 240 workers should be able to make in 5 hours?
The volume of gas a constant temperature varies inversely as the pressure. Find the volume of a gas under pressure of 20 pounds, if the gas occupies 15 cubic centimeters under a pressure of 30 pounds.
The electrical resistance, R, of a wire varies directly as its length and inversely as the square of its diameter. If the resistance of a 100 meter wire having a diameter of 1/2 cm. is 0.75 ohms, find the resistance of a 300 meter wire with a diameter of 1/4 cm.
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