Question -> Two alloy of Copper & Zinc, in the first alloy the ratio of Copper & Zinc is 3:4, in the second alloy the ratio of Copper & Zinc is 6:1, In what proportion should these two alloys be mixed so that a new alloy containing equal part of Copper & Zinc must be added.
Ans :- > 5:1
Can anyone please help with solution
Ratio Tough Question
This topic has expert replies
-
- Senior | Next Rank: 100 Posts
- Posts: 65
- Joined: Thu Jul 02, 2009 10:38 pm
- Location: Bangalore
- Thanked: 1 times
-
- Newbie | Next Rank: 10 Posts
- Posts: 3
- Joined: Sun Aug 16, 2009 5:17 am
- Thanked: 1 times
- GMAT Score:610
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).
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).