how high is a tree that casts a 39 ft shadow at the same time a 8 ft post casts a shadow which is 10 ft long?

Question

How tall is the tree?

 

Answer 1

We will use proportions

 

tree height divided by 39 = 8ft post divided by 10

 

T/39 = 8/10

 

We will cross multiply:

 

10T = 39*8

 

We will then divide by 10

 

T = 39*8/10 = 31.2 feet