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The mass of 1 cubic meter of a substance is 800 kg under

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The mass of 1 cubic meter of a substance is 800 kg under [#permalink]

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New post Updated on: 01 Feb 2012, 15:47
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The mass of 1 cubic meter of a substance is 800 kg under certain conditions. What is the volume in cubic centimeters of 1 gram of this substance under these conditions? (1 kg =1,000 grams and 1 cubic meter = 1,000,000 cubic centimeters)

A. 0.8
B. 1.25
C. 8.0
D. 12.50
E. 80

Is there an easy way to do these types of problems? I spent a lot of time trying to figure out the correct conversions and then still got the wrong answer (correct digits, just was off by a power of 10)

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Originally posted by Michmax3 on 27 Sep 2010, 22:31.
Last edited by Bunuel on 01 Feb 2012, 15:47, edited 2 times in total.
Added the answer choices
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Re: Mass of a substance [#permalink]

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New post 27 Sep 2010, 23:21
800kg --> 1 m3 = 1000000 cm3
1 g --> 1000000/(800*1000) cm3
= 1.25 cm
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Re: Mass of a substance [#permalink]

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New post 28 Sep 2010, 01:18
1
Michmax3 wrote:
The mass of 1 cubic meter of a substance is 800 kg under certain conditions. What is the volume in cubic centimeters of 1 gram of this substance under these conditions? (1 kg = 1,000 grams and 1 cubic meter = 1,000,000 cubic centimeters)

A. 0.8
B. 1.25
C. 8.0
D. 12.50
E. 80


800 kg - 1 cubic meter;
800,000 g - 1 cubic meter;
800,000 g - 1,000,000 cubic centimeters;
1 g - 1,000,000/800,000 = 10/8 = 1.25 cubic centimeters.

Answer: B.

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Re: Mass of a substance [#permalink]

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New post 28 Sep 2010, 08:52
I got it quickly by just plugging in answer choices. Start with B then move to D if B is not correct and you will never need to plug in more than 2.
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Re: The mass of 1 cubic meter of a substance is 800 kg under [#permalink]

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New post 25 Mar 2015, 03:56
8*10^5 =10^6
then 1= 10^6/ 8*10^5=1.25(B) This is easy way I think!!
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Re: The mass of 1 cubic meter of a substance is 800 kg under [#permalink]

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New post 06 May 2017, 12:09
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Re: The mass of 1 cubic meter of a substance is 800 kg under   [#permalink] 06 May 2017, 12:09
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