Question 26448
Let Lincoln be x
Let Square tower be 2x
Let Washington be 200+x
(x)+(2x)+(200+x)=1800
4x+200=1800
4x=1600
x=400


2(400)=800
200+400=600


Hence, the Lincoln is 400ft, the Square is 800ft, and the Washington is 600ft.
Paul.