November 01, 2012
Related Rates, Day 3 - Shadow Problems!
Problem #1: A light is located on the ground 60 feet in front of a tall
building. A man comes out of the building and walks toward the light at
the rate of 8 ft/sec. Assuming that the man is 6 feet tall, how fast will his
shadow on the building be growing by the time he is halfway to the light?
Answer provided by David Feiman
November 01, 2012
Problem #2: A man 7 feet tall is 20 feet from a 28-foot lamppost and is
walking away from it at the rate of 4 ft/sec. How fast is his shadow
changing at that moment?
Answer provided by Paxton Moore