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 4cm/minute. When x = 8 cm and y = 6 cm, find the rates of change of (i) the perimeter (ii) the area of the rectangle.

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 4cm/minute. When x = 8 cm and y = 6 cm, find the rates of change of (i) the perimeter (ii) the area of the rectangle.

Matching exercise

Match the items on the right to the items on the left.

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