Hello, anfieldgirl!
Sounds like "Home Alone" . . .
Carlo is perched precariously on top of a 10foot ladder leaning
against the back wall of an apartment building (spying on an enemy of his)
when it starts to slide down the wall at a rate of 4 ft per minute.
Carlo's accomplice, Alex, is standing on the ground 6 ft away from the wall.
How fast is the base of the ladder moving when it hits Alex? Code:

*
\
 \
 \
y  \ 10
 \
 \
 \
*    *   *
x A
We are given: . ft/min.
We know that: .
Differentiate with respect to time: .
When
So we have: .
The base of the ladder hits Alex at ft/min.