Two cylinders
Two cylinders are there, one with oil and one with an empty oil cylinder has no fixed value assumed infinitely. We are pumping out the oil into an empty cylinder with a radius =1 cm, height=3 cm, rate of pumping oil is 9 cubic centimeters per sec. We are pumping out oil from an empty cylinder at a rate of 2 millimeters per sec. Find the time to make the oil cylinder having radius=1 empty.
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