Question

I

A tree casts a shadow 42 feet long. At the same time, a person 5 feet tall casts a shadow 7 feet
long. What is the height of the tree?
x
11
59 ft
30 ft
5 ft
xft
7ft

Answer 1

The tree is 30 feet

Explanation:

Set up a proportion

`(height)/(shadow)` =
`(height)/(shadow)` Fill in what you know

`(x)/(42)` =
`(5)/(7)` Cross multiply

7x = 210 Divide both sides by 7

x = 30