# Thread: Rotation around the y-axis

1. ## Rotation around the y-axis

Hi!

Could someone please explain to me why the solution states that x = 0.75 NOT 1.5 when the vessel is full?

Thanks!!!

2. ## Re: Rotation around the y-axis

When the vessel is full, then x - (-x) = 2x = 1.5, thus x = 0.75.