A ​-ft vertical post casts a ​-in shadow at the same time a nearby cell phone tower casts a ​-ft shadow. How tall is the cell phone​ tower?

Answer 1

Since you don't provide any numbers, I'll just tell you the general way to solve this sort of question.

Set it up with ratios as fractions, and make sure each ratio has the same units in the numerator and denominator. Set them equal to each other, and solve for the unknown.

If your post is a inches tall and casts a shadow of b inches, and the tower is x feet tall and casts a shadow of d feet, then (a/b)=(c/d). Cross multiply and solve for x.

I hope this helps!

If you include your measurements, I bet you'll get a quick answer to your question.

Have fun mathing!

Liz Z.