So you need to find the volume of the rectangular prism and the equation for that is V=l×w×h. If you plug those numbers in you'd get 9×12×23=2,484. If you multiply 2,484 by [tex] \frac{1}{3} [/tex] because you'd have to pour out [tex] \frac{1}{3} [/tex] of the water out so that it's only [tex] \frac{2}{3} [/tex] of the volume of water is left. 2,484×[tex] \frac{1}{3} [/tex]= 828mm.
