A rectangle maintains constant area

MATHEMATICS · Single correct · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

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}

(b)

2.0\text{ cm/s}

(c)

0.8\text{ cm/s}

(d)

-0.8\text{ cm/s}