Posted by Kati on Wednesday, August 12, 2009 at 4:45pm.
A tree casts a shadow that measures 5 m. At the same time, a meter stick casts a shadow that is 0.4 m long. How tall is the tree?

Math  MathMate, Wednesday, August 12, 2009 at 5:00pm
We will solve the problem by proportions.
Let the height of the tree be x, then
x/5 = 1/0.4
Crossmultiply to get
x=5*1/0.4=12.5 m.
Thus the tree is 12.5 m. tall