In the diagram not drawn to scale, Container E and Container F each has a button that, when pressed, will cause the water to flow out if the water level is higher than the hole. Container E measures 70 cm by 65 cm by 140 cm. Container F measures 15 cm by 10 cm by 90 cm. Container G is 50 cm by 10 cm by 70 cm. Both holes are located at a height of 20 cm from the top of their respective containers. When Container E is completely filled with water and both buttons are pressed, what will be the final water level in Container G? Express your answer in mixed number.
Volume of Container E to pour into Container F
= 70 x 65 x 20
= 91000 cm³

Volume of the Container F that can be filled before overflow
= 15 x 10 x (90 - 20)
= 10500 cm³ 

Volume of water in the Container G
= 91000 - 10500
= 80500 cm³ 

Base Area of the Container G
= 50 x 10
= 500 cm² 

Final height of the container G
= 161
= 161 cm

Answer(s): 161 cm