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How many liters of a solution that is 15 percent salt must b
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02 Dec 2020, 08:59
02 Dec 2020, 08:59
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82% (01:26) correct
17% (01:41) wrong based on 17 sessions
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How many liters of a solution that is 15 percent salt must be added to 5 liters of a solution that is 8 percent salt so that the resulting solution is 10 percent salt?
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Re: How many liters of a solution that is 15 percent salt must b
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03 Dec 2020, 01:55
03 Dec 2020, 01:55
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let X liter solution needs to be added,
(0.15x+.08*5)/5+x=0.1=> x= 2 liters (answer)
(0.15x+.08*5)/5+x=0.1=> x= 2 liters (answer)
Re: How many liters of a solution that is 15 percent salt must b
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03 Dec 2020, 18:02
03 Dec 2020, 18:02
1
GreenlightTestPrep wrote:
How many liters of a solution that is 15 percent salt must be added to 5 liters of a solution that is 8 percent salt so that the resulting solution is 10 percent salt?
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We have 5 liters of solution with 8% salt.
We also have unlimited quantity of solution with 15% salt.
The question asks us to add x liters of solution with 15% salt to 5 liters of solution with 8% salt to make it x+5 liters of solution with 10% salt.
15% of x liters + 8% of 5 liters = 10% of (5 + x) liters.
0.15x + 0.08(5) = 0.10(5+x) --> 0.15x + 0.40 = 0.50 + 0.10x.
0.05x = 0.10 --> x = 2.
Therefore 2 liters of solution with 15% salt has to be added to make a 7 liter solution with 10% salt.
