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12 Oct 2021, 08:15
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
79% (01:52) correct
21%
(02:06)
wrong
based on 209
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A salt-water solution that contains 8% salt by volume is kept in the sun till enough water evaporates from the solution such that the concentration of salt in the solution becomes 20%. If the volume of the remaining solution is 20 liters, what was the volume of the solution before it was kept in the sun?
A. 23 liters
B. 40 liters
C. 46 liters
D. 50 liters
E. 80 liters
A. 23 liters
B. 40 liters
C. 46 liters
D. 50 liters
E. 80 liters
12 Oct 2021, 08:43
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Bunuel
A salt-water solution that contains 8% salt by volume is kept in the sun till enough water evaporates from the solution such that the concentration of salt in the solution becomes 20%. If the volume of the remaining solution is 20 liters, what was the volume of the solution before it was kept in the sun?
A. 23 liters
B. 40 liters
C. 46 liters
D. 50 liters
E. 80 liters
Remaining Solution 20 LtrA. 23 liters
B. 40 liters
C. 46 liters
D. 50 liters
E. 80 liters
Salt 20*20/100 = 4 Ltr
Before, 4*100/8 = 50
Ans. D
12 Oct 2021, 11:20
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Correct Option D
Let original water salt solution be x
Solution = (8x/100)
after water salt solution 20 lit and 20% salt
20*20% = 4 lit salt
Before = After
(8x/100) = 4
x = (4/8)*100
X = 50 = Option D
Posted from my mobile device
Let original water salt solution be x
Solution = (8x/100)
after water salt solution 20 lit and 20% salt
20*20% = 4 lit salt
Before = After
(8x/100) = 4
x = (4/8)*100
X = 50 = Option D
Posted from my mobile device
