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Mathematics 16 Online
OpenStudy (jamanorthi):

What is the volume of a 15.0 kg cube with edge length 12.0 cm if it has a density of 2.70 g/mL?

OpenStudy (danjs):

Just need to know it is a Cube, and side length is 12.0 cm... Cube volume is side cubed

OpenStudy (jamanorthi):

so 12.0^3 ?

OpenStudy (danjs):

right [12.0 cm]^3 = 12.0^3 cm^3

OpenStudy (jamanorthi):

But then when dividing the mass by the volume we do not get the density of 2.70 g/mL ?

OpenStudy (mathstudent55):

There is too much information in this problem, and the information is inconsistent. A cube with a 12.0-cm edge has a volume of 1728 cm^3. If it has a mass of 15.0 kg, then the density is density = mass/volume = (15.0 kg)/(1728 cm^3) = 8.68 g/mL The problem stated the density is 2.70 g/mL

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