BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

340. A scientist pours 20 liters of a 16% alcohol solution i

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 298
Joined: Sun Jun 03, 2012 6:42 am
Location: New delhi
Thanked: 10 times
Followed by:7 members
GMAT Score:590

340. A scientist pours 20 liters of a 16% alcohol solution i

by varun289 » Sun Dec 16, 2012 11:22 am
340. A scientist pours 20 liters of a 16% alcohol solution into 60 liters of a 20% alcohol solution. How many liters of the resulting solution must she add to 10 liters of a 30% alcohol solution to create a solution that is 24% alcohol?
A. 23 liters
B. 13 liters
C. 15 liters
D. 12 liters
E. 20 liters
Top
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 131
Joined: Wed Nov 14, 2012 2:01 pm
Thanked: 39 times
Followed by:2 members

by puneetkhurana2000 » Sun Dec 16, 2012 2:00 pm
Resulting solution is (20*16 + 60*20)/(20+60) = 19% alcohol.

Now using mixture formulas, we get (30-24)/(24-19) = (x/10) , solving we get x = 12 liters.

Answer D.
Top
Post new topic Post Reply
• Page 1 of 1