Container C and D are identical containers with the same base area and height. Container C is filled to the brim with water while Container D is empty. After 230 cm³ of water from Container C is poured into Container D, the depth of water in Container D is ¹₇ the depth of water in Container C. If the height of Container D is 40 cm, what is the base area of Container D?
The depth of water is proportional to the volume of water.

After water from Container C is poured into Container D:

Volume of water in Container C : Volume of water in Container D
 7 : 1

1 u = 230

Total volume of Container D
= 7 u + 1 u
= 8 u
= 8 x 230
= 1840 cm³

Base area of Container D
= 1840 ÷ 40
= 46 cm²

Answer(s): 46 cm²