# Question #fe069

##### 1 Answer

Jul 26, 2015

The rate of change of the length of the shadow would be a constant = 5.6 ft per second

#### Explanation:

Let the length of the shadow at any time t secs after woman walks away from the wall be x ft. During this time she would have walked away 4t feet from the wall, as shown in the figure.

The height of the woman 5ft 10 inches would be

Comparing two similar triangles, as seen in the figure, it would be