Question

In sunlight, a vertical yardstick casts a 1 ft shadow at the same time that a nearby tree casts a 15 ft shadow. How tall is the tree?

Answer 1

This is a ratio question.
The correct answer is 45 feet.
This is question is like looking at 2 similar triangles.
The ratio of the first shadow and the second shadow is 1:15.
Since 1 yard = 3 feet, the height of the tree is 3(15)=45