Question

The two bases of an isosceles trapezoid are 12 and 20 feet long, respectively. Find the rate at which the area is changing when the equal sides are 5 feet long and are increasing at the rate of 2 feet per minute.

Answer 1

The area is .5(a + b) x h right? Because the equal sides are increasing, we also have h increasing? So we need to solve for h first then.

Answer 2

20 - 12 = 8; 8/2 = 4