at a certain time of day, a flag pole has a shadow 40 feet long.At the same time, a 6 foot tall man casts a shadow 15 feet long. What is the height of the flag pole
We can solve this with a proportion
6/15 = H/40 cross-multiply
6 * 40 = 15 * H
240 = 15 * H divide both sides by 15
240/15 = H = 16 ft = the flagpole height
thanks