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# Gravel

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Manager
Joined: 21 Feb 2009
Posts: 108

Kudos [?]: 98 [0], given: 4

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19 Jul 2009, 01:54
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Kudos [?]: 98 [0], given: 4

Manager
Joined: 18 Jul 2009
Posts: 167

Kudos [?]: 116 [0], given: 37

Location: India
Schools: South Asian B-schools

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19 Jul 2009, 15:04
x tons (10%) + y tons (2%) => z = x+y tons (5%)
hence x/y = constant (mixture property)

1) y = 10 > x can be calculated
2) z = 16 > y= 16-x ... can be calculated

hence D
_________________

Bhushan S.
If you like my post....Consider it for Kudos

Kudos [?]: 116 [0], given: 37

Senior Manager
Joined: 18 Jun 2009
Posts: 356

Kudos [?]: 78 [0], given: 15

Location: San Francisco

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19 Jul 2009, 20:15
0.1x+0.2y = 0.5X .... 1

x+y=Z ..... 2

So we have two equations and three variables. if we know one of the variables then we can solve for the other two.

Kudos [?]: 78 [0], given: 15

Re: Gravel   [#permalink] 19 Jul 2009, 20:15
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