A flag post casts a shadow of 8.75 feet long. At the same time of day a 6-foot tall person casts a shadow of 1.75 fee long. How long is the flagpole?
Simple ratio problem.
X: 8.75 = 6 : 1.75
or
X/8.75 = 6/1.75
X = (6/1.75) x 8.75
