Question

43. The length x of a rectangle is decreasing at the rate of 5 cm/minute and width y is
increasing at the rate of 4 cm/minute. When x = 8 cm and y = 6 cm, find the rate of change
of i) the perimeter and ii) the
area of the rectangle.
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Answer 1

Answer:

perimeter will change -2cm per min

area -28 per min