SOLUTION: HOW TALL IS A TREE THAT CAST A 25FT SHADOW AT THE SAME TIME A 9FT LIGHT POLES CASTS A 15FT SHADOW?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: HOW TALL IS A TREE THAT CAST A 25FT SHADOW AT THE SAME TIME A 9FT LIGHT POLES CASTS A 15FT SHADOW?      Log On


   

Question 78568This question is from textbook
: HOW TALL IS A TREE THAT CAST A 25FT SHADOW AT THE SAME TIME A 9FT LIGHT POLES CASTS A 15FT SHADOW? This question is from textbook

Answer by ptaylor(2198) About Me  (Show Source):
You can put this solution on YOUR website!
Let x= height of tree
Now we know that x is to 25 ft as 9 is to 15 ft. Written as follows:
x%2F25=9%2F15 cross multiply
15x=9%2A25=225 divide both sides by 15
x=15 ft------------------height of tree
CK
15%2F25=9%2F15
3%2F5=3%2F5

Hope this helps---ptaylor