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# Need Help solving 600-700 level PS

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Intern
Joined: 19 Dec 2009
Posts: 33
Followers: 0

Kudos [?]: 62 [0], given: 9

Need Help solving 600-700 level PS [#permalink]

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15 Oct 2010, 10:20
00:00

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(N/A)

Question Stats:

50% (00:00) correct 50% (01:57) wrong based on 3 sessions

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Does anyone have a good strategy to solving solutions problems?

Question

How many gallons of water must be mixed with 1 gallon of a 15% salt solution to obtain a 10% salt solution?

A 0.50
b 0.67
c 1.00
d 1.50
e. 2.00
Manager
Joined: 08 Sep 2010
Posts: 233
Location: India
WE 1: 6 Year, Telecom(GSM)
Followers: 4

Kudos [?]: 233 [2] , given: 21

Re: Need Help solving 600-700 level PS [#permalink]

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15 Oct 2010, 22:56
2
KUDOS
rtaha2412 wrote:
Does anyone have a good strategy to solving solutions problems?

Question

How many gallons of water must be mixed with 1 gallon of a 15% salt solution to obtain a 10% salt solution?

A 0.50
b 0.67
c 1.00
d 1.50
e. 2.00

you are having 1 gallon of a 15% salt solution means you are having (15/100)*1 gallon of salt.

Now consider you are using x gallons of water and making it to (x+1) gallon of solution.now the salt content(15/100) will be the 10% of total solution.
Hence (10/100)(x+1)=15/100

Solving we get x=0.5 gallon.Answer is A.

Consider KUDOS if it is helpful to u.Thanks.
Re: Need Help solving 600-700 level PS   [#permalink] 15 Oct 2010, 22:56
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