Question: A closed box gas length, l, height, h and width, w. The length is increasing at a rate of 3ft/min and the width is decreasing

A closed box gas length, l, height, h and width, w. The length is increasing at a rate of 3ft/min and the width is decreasing at a rate of 2ft/min. Find the rate at which the surface area of the box is changing when l=2 ft. And w=h=5ft

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