In the diagram not drawn to scale, Container V and Container W each has a button that, when pressed, will cause the water to flow out if the water level is higher than the hole. Container V measures 90 cm by 75 cm by 80 cm. Container W measures 75 cm by 10 cm by 90 cm. Container X is 50 cm by 50 cm by 30 cm. Both holes are located at a height of 10 cm from the top of their respective containers. When Container V is completely filled with water and both buttons are pressed, what will be the final water level in Container X? Express your answer in mixed number.
Volume of Container V to pour into Container W
= 90 x 75 x 10
= 67500 cm³

Volume of the Container W that can be filled before overflow
= 75 x 10 x (90 - 10)
= 60000 cm³ 

Volume of water in the Container X
= 67500 - 60000
= 7500 cm³ 

Base Area of the Container X
= 50 x 50
= 2500 cm² 

Final height of the container X
= 3
= 3 cm

Answer(s): 3 cm