The Sides of a Rectangle Are Increasing

question 53

Multiple Choice

The sides of a rectangle are increasing. One side is increasing at a rate of 3 m/sec and the adjacent side is increasing at a rate of 4 m/sec. At what rate is the area of the rectangle increasing?

• A) 12
• B) 7
• C) 25
• D) 5
• E) The solution depends on the values of the sides at the time .