Question 522767
The weight of a liquid varies directly as it's [sic] volume V.  If the weight of the liquid in a cubical container 3 cm on a side is 81g, find the weight of the liquid in a cubical container 5cm on a side?
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Volume is a function of the cube of the side of a cube
81:3^3::W:5^3
27W = 81*125
W = 375 g
Some very dense water.
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PS  it's = it is