# Recent questions tagged q7-a

Questions from:

### The length $$x$$ of a rectangle is decreasing at the rate of $5\; cm/minute$ and the width y is increasing at the rate of $4\; cm/minute$. When $$x = 8$$cm and $$y = 6$$cm, find the rates of change of (a) the perimeter

To see more, click for the full list of questions or popular tags.