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maths

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suyash
 Post subject: maths
 Post Posted: Wed Feb 20, 2008 9:32 am 
[deleted b/c poster did not cite author]

how to do in a quick and simple way?
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brian
 Post subject:
 Post Posted: Thu Feb 21, 2008 1:28 am 
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ManhattanGMAT Staff


Posts: 27
Please cite the question's author - if you are referring to an official paper test, please state "official paper test" or "GMAC paper test"
Thanks!
Brian Lange
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guest
 Post subject: what ?
 Post Posted: Thu Feb 21, 2008 8:53 pm 
[deleted b/c poster did not cite author]


simplifying each equation
20j = 4k
6k = 2i
28i = 24m

Writing all variables in terms of 1 variable, say k,
j = 4/20 k = 1/5 k
i = 3k
m = 28/24 * 3k = 7k/2

20% of m = 1/5 * 7k/2 = 7k/10
200% of j = 2 * k/5 = 2k/5

20% of m is what % of 200% of j ?

7k/10
------- * 100
2k/5

= 175

mm... ? not one of the answers...??!!
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bhawna
 Post subject: Easy
 Post Posted: Thu Feb 28, 2008 12:39 am 
Ans shud be 350.
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Bhawna
 Post subject:
 Post Posted: Thu Feb 28, 2008 12:46 am 
[deleted b/c poster did not cite author]


from 1,2,3..... 5j = k = 1/3 I= 1/3 * 3/7 M = 1/7 M
=> j = 1/35 M

let it be x %... then
20 /100 M = X/ 100 * 200/100 * J
1/5 M= X/50 * J
1/5 M= X/50 *1/35 M
X= 350
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