## PRACTICE PROBLEM SET 12 Now try these problems on your own
MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation
Problem
## PRACTICE PROBLEM SET 12
Now try these problems on your own. The answers are in Chapter 23, starting on page 504.
4. The sides of an equilateral triangle are increasing at the rate of 27in./sec. How fast is the triangle's area increasing when the sides of the triangle are each 18 inches long?