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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Ratio question

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 91
Joined: Wed May 16, 2007 5:46 am
Thanked: 2 times
by raulverde » Mon Jul 30, 2007 10:50 am
Gold is 19 times heavier than water. Copper is 9 times heavier than water. In what ratio should Gold and Copper be mixed to get an alloy 15 times heavier than water.

Source : Quantitative Aptitude by R.S Aggarwal
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 277
Joined: Sun Jun 17, 2007 2:51 pmFollowed by: 1 member
Location: New York, NY
Thanked: 6 times

by givemeanid » Mon Jul 30, 2007 11:18 am
C*(15-9) = G*(19-15)
6C = 4G
C/G = 4/6 = 2/3
So It Goes
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Fri Feb 02, 2007 10:49 am

by sally123 » Mon Jul 30, 2007 11:33 am
givemeanid
Can you please elaborate the solution
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 91
Joined: Wed May 16, 2007 5:46 am
Thanked: 2 times

by raulverde » Mon Jul 30, 2007 11:37 am
The answer is right....but please elaborate
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 277
Joined: Sun Jun 17, 2007 2:51 pmFollowed by: 1 member
Location: New York, NY
Thanked: 6 times

by givemeanid » Mon Jul 30, 2007 11:54 am
(percent/price difference between weaker solution and desired solution) x (amount of weaker solution) = (percent/price difference between the stronger solution and desired solution) x (amount of stronger solution)

Here, weaker alloy is copper (9 times heavier than water)
Desired alloy is 15 times heavier than water
Stronger alloy is gold (19 times heavier than water)

Let quantity of copper = C
Quantity of Gold = G.

From the above mentioned formula, C*(15-9) = G*(19-15)
So It Goes
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1