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Retired Moderator
Joined: 19 Nov 2020
Posts: 326
Given Kudos: 64
GRE 1: Q160 V152
3 liters of solution with 45% concentration ...
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29 Jul 2021, 15:28
29 Jul 2021, 15:28
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3 liters of solution with 45% concentration of alcohol and the remaining part of water must be added how many liters of water so that new solution has 30% concentration of acohol?
(A) 1 liters
(B) 1.5 liters
(C) 2 liters
(D) 2.5 liters
(E) 3 liters
(A) 1 liters
(B) 1.5 liters
(C) 2 liters
(D) 2.5 liters
(E) 3 liters
Retired Moderator
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WE:Education (Education)
Re: 3 liters of solution with 45% concentration ...
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29 Jul 2021, 20:17
29 Jul 2021, 20:17
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motion2020 wrote:
3 liters of solution with 45% concentration of alcohol and the remaining part of water must be added how many liters of water so that new solution has 30% concentration of acohol?
(A) 1 liters
(B) 1.5 liters
(C) 2 liters
(D) 2.5 liters
(E) 3 liters
(A) 1 liters
(B) 1.5 liters
(C) 2 liters
(D) 2.5 liters
(E) 3 liters
55% water of 3 liters + x liters of water = 70% of (x + 3) liters
0.55(3) + x = 0.70(x + 3)
1.65 + x = 0.7x + 2.1
0.3x = 0.45
x = 1.5 liters
Hence, option B
gmatclubot
Re: 3 liters of solution with 45% concentration ... [#permalink]
29 Jul 2021, 20:17
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