Search found 3 matches
Say you need to use x amount of Alloy 1 and y amount of Alloy 2 to balance the Copper and Zinc.
So Copper from Alloy 1 is 3x/7 and from Alloy 2 6y/7.
Zinc from Alloy 1 is 4x/7 and from Alloy 2 y/7.
It follows that 3x+6y=4x+y or x=5y or so the ration is 5:1 (x:y).
- by a_forest
Mon Sep 21, 2009 6:15 am- Forum: Problem Solving
- Topic: Ratio Tough Question
- Replies: 1
- Views: 1247
Nasty one... Let's say the can contains x liters. So at first the a content is 7/12*x and the b content is 5/12*x. After 9 liters are drawn, the ratio is maintained. So the a content is 7/12*(x-9) and b content is 5/12*(x-9). After 9 liters of b are added, the b content is 5/12*(x-9)+9. The ratio th...
- by a_forest
Mon Sep 21, 2009 6:03 am- Forum: Problem Solving
- Topic: Mixture Question
- Replies: 2
- Views: 1004
Has anyone got a 1-month study plan?
Hi y'all,
I've searched for a 1-month study plan in the forum and I can't find any (except for the post about preparing in under a month) -- can anyone point me to a good plan for a 1-month prep?
Thanks!
- by a_forest
Tue Aug 25, 2009 9:45 am- Forum: GMAT Strategy
- Topic: Has anyone got a 1-month study plan?
- Replies: 1
- Views: 1055