Container D and E are identical containers with the same base area and height. Container D is filled to the brim with water while Container E is empty. After 204 cm³ of water from Container D is poured into Container E, the depth of water in Container E is ¹₉ the depth of water in Container D. If the height of Container E is 24 cm, what is the base area of Container E?
The depth of water is proportional to the volume of water.

After water from Container D is poured into Container E:

Volume of water in Container D : Volume of water in Container E
 9 : 1

1 u = 204

Total volume of Container E
= 9 u + 1 u
= 10 u
= 10 x 204
= 2040 cm³

Base area of Container E
= 2040 ÷ 24
= 85 cm²

Answer(s): 85 cm²