A whispering chamber is an elliptically arched chamber. A unique feature of a whispering chamber is that when a person standing at one focus of the ellipse whispers, he can be heard by a person standing at the other focus, regardless of the dimensions of the ellipse from which the dome is built.
Suppose that the dimensions of the ellipse used to create a whispering dome is 140 feet by 300 feet. Manuel stands at one focus, and Michelle stands at the other focus.
How far apart are Manuel and Michelle?