Question: the length l and width w .... are increasing at a rate of 4 ft/min while its height h is decreasing a rate of 8

the length l and width w .... are increasing at a rate of 4 ft/min while its height h is decreasing a rate of 8 ft/min. find the rate at which the surface area of the box is increasing when

l=6, w=h=3 feet

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