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The length x of a rectangle is decreasin...

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

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The correct Answer is:
(a) 18cm (b) `62 cm^(2)`
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