In the diagram not drawn to scale, Tank L and Tank M each has a button that, when pressed, will cause the water to flow out if the water level is higher than the hole. Tank L measures 124 cm by 45 cm by 122 cm. Tank M measures 52 cm by 30 cm by 55 cm. Tank N is 60 cm by 30 cm by 25 cm. Both holes are located at a height of 13 cm from the top of their respective containers. When Tank L is completely filled with water and both buttons are pressed, what will be the final water level in Tank N?
Volume of Tank L to pour into Tank M
= 124 x 45 x 13
= 72540 cm³

Volume of the Tank M that can be filled before overflow
= 52 x 30 x (55 - 13)
= 65520 cm³ 

Volume of water in Tank N
= 72540 - 65520
= 7020 cm³ 

Base area of Tank N
= 60 x 30
= 1800 cm² 

Final height of Tank N
= 7020 ÷ 1800
= 3.9 cm

Answer(s): 3.9 cm