At which the surface area s is changing at that instant

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Let S be the surface area of a closed box of length L, width W, and height H. The box dimensions are changing with time. At a certain instant dimensions are L = 3 and W = H = 5. At that instant L and W are increasing at a rate of 10 m/s while H is decreasing at a rate of 1 m/s. Find the rate at which the surface area S is changing at that instant.

Reference no: EM13186075

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