Mathematics

Problem

A rectangle maintains constant area

60\text{ cm}^2

. At the moment its length is

10\text{ cm}

and increasing at

1\text{ cm/s}

, determine the instantaneous rate of change of the rectangle’s perimeter. a)

3.2\text{ cm/s}

2.0\text{ cm/s}

0.8\text{ cm/s}

-0.8\text{ cm/s}