Posted by **Demetria** on Thursday, November 10, 2011 at 3:33pm.

A recatangle has constant area of 200 square meters and its lenght L is increasing at the rate of 4 meters per second

a) find the width W at the instant that the width is decreasing at the rate of .5 meters per second

b) at what rate is the diagonal d of the rectangle changing at the instant when the width is 10 meters?

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