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GMAT prep mass/volume?

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GMAT prep mass/volume?

by awilhelm » Tue Jan 20, 2009 2:18 pm
The mass of 1 cubic meter of a substance is 800 kilograms under certain conditions. What is the volume, in cubic centimeters, of 1 gram of this substance under these conditions? (1 kilogram = 1,000 grams and 1 cubic meter = 1,000,000 cubic centimeters)

A) 0.80
B) 1.25
C) 8.00
D) 12.50
E) 80.00

Any thoughts?
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by truplayer256 » Tue Jan 20, 2009 3:08 pm
The mass of 1 cubic meter of a substance is 800 kilograms under certain conditions. What is the volume, in cubic centimeters, of 1 gram of this substance under these conditions? (1 kilogram = 1,000 grams and 1 cubic meter = 1,000,000 cubic centimeters)
800 kilograms= 1000*800=800,000 grams

800,000 grams/1,000,000 cubic cm=1/x
x=1.25 cubic centimeters
B
Last edited by truplayer256 on Tue Jan 20, 2009 3:20 pm, edited 1 time in total.
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by awilhelm » Tue Jan 20, 2009 3:15 pm
OA is not A, sorry.
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by truplayer256 » Tue Jan 20, 2009 3:20 pm
Wow, I cross-multiplied wrong...the answer's b
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by awilhelm » Tue Jan 20, 2009 3:23 pm
Right. Thanks, makes perfect sense.
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