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Math problem: The bottle of grade six contains 400g water, with a height of 14cm. If the inverted height of the bottle is 18cm, find the bottle volume.
For the bottom of the bottle, the weight of water per centimeter is 400g/ 14cm.

Empty space can be filled with water (25-18) * 400/14 = 200g.

The bottle can hold 400g+200g=600g.

The density of water is 1g/cm3.

Volume =600/ 1=600 cubic centimeters or 600ml.

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