Please Help! 40 Points!

Please explain your answer!

Mike is hanging lights on his barn for a square dance. Using a book to sight the top and bottom of the barn, he can see he is 15 feet from the barn. If his eye level is 5 feet from the ground, how tall is the barn?

Respuesta :

Fyi I didn't find this on google or anything I did the calculation on my computer and yes this is correct...

If it's wrong I'm sorry...
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