on a sunny day, a streetlight that is 9 m high cast a shadow that is 6 m long. At the same time, a fence post cast a shadow that is 2 m long. How tall is the fence post?
Using a proportion, we have
9/6 = x/2 where x is the fence post height
Cross multiply
9*2 = 6*x divide both sides by 6
9*2/6 = x
18/6 = x = 3m
