A conical tank (with vertex down) is 18 feet across the top and 12 fee

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A conical tank (with vertex down) is 18 feet across the top and 12 feet deep. If water is flowing into the tank at a rate of 18 cubic feet per minute, find the rate of change of the depth of the water when the water is 10 feet deep. Select the correct answer. 1 15π ft/min 2 75π ft/min 4 5π ft/min 8 25π ft/min 2 25π ft/min

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A conical tank (with vertex down) is 18 feet across the top and 12 feet deep. If water is flowing into the tank at a rate of 18 cubic feet per minute, find the rate of change of the depth of the water when the water is 10 feet deep. Select the correct answer. $\frac{1}{15 π} f t / m i n$ $\frac{2}{75 π} f t / m i n$ $\frac{4}{5 π} f t / m i n$ $\frac{8}{25 π} f t / m i n$ $\frac{2}{25 π} f t / m i n$