In the diagram not drawn to scale, Tank C and Tank D each has a button that, when pressed, will cause the water to flow out if the water level is higher than the hole. Tank C measures 136 cm by 50 cm by 145 cm. Tank D measures 56 cm by 30 cm by 50 cm. Tank E is 60 cm by 20 cm by 30 cm. Both holes are located at a height of 12 cm from the top of their respective containers. When Tank C is completely filled with water and both buttons are pressed, what will be the final water level in Tank E?
Volume of Tank C to pour into Tank D
= 136 x 50 x 12
= 81600 cm³

Volume of the Tank D that can be filled before overflow
= 56 x 30 x (50 - 12)
= 63840 cm³ 

Volume of water in Tank E
= 81600 - 63840
= 17760 cm³ 

Base area of Tank E
= 60 x 20
= 1200 cm² 

Final height of Tank E
= 17760 ÷ 1200
= 14.8 cm

Answer(s): 14.8 cm