Prope A whispering gallery is an enclosure where the whispers emanating from one location may be heard clearly from one location in another location. In an ellipsoidal whispering gallery, if a person positions at one focus and whispers, the sound waves emitted from this focus is reflected to the focus near the other end of the gallery, where the whispers are audible. An ellipsoid is the surface formed when an ellipse is revolved about its major axis. Consider a semi-ellipsoidal whispering room wherein the longest distance from wall to wall is 45 ft and the highest point of the ceiling is 15 ft. from the floor If two friends want to invalidate if indeed the room is a whispering gallery, how far should they stay from the center of the room? How far should they be from from each other