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27 Apr 2022, 01:30
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
60% (02:24) correct
40%
(02:31)
wrong
based on 265
sessions
History
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How many litres of a 12 litre mixture containing milk and water in the ratio of 2:3 be replaced with milk so that the resultant mixture contains milk and water in equal proportion?
A. 1 litre
B. 2 litres
C. 2.5 litres
D. 4 litres
E. 6 litres
Are You Up For the Challenge: 700 Level Questions
A. 1 litre
B. 2 litres
C. 2.5 litres
D. 4 litres
E. 6 litres
Are You Up For the Challenge: 700 Level Questions
27 Apr 2022, 06:35
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After the replacement, there will be 12/2=6 liter of milk in the mixture.
Solve for x
(12-x)*(2/5) + x = 6
=> x = 2
The answer is thus (B)
Solve for x
(12-x)*(2/5) + x = 6
=> x = 2
The answer is thus (B)
General Discussion
Asked: How many litres of a 12 litre mixture containing milk and water in the ratio of 2:3 be replaced with milk so that the resultant mixture contains milk and water in equal proportion?
12 litre mixture: -
Milk = 12*2/5 = 4.8 litres
Water = 12*3/5 = 7.2 litres
Replaced mixture: -
Let x litres of mixture be replaced with milk
Milk = 4.8 - 2x/5 + x = 6
Water = 7.2 - 3x/5 = 6
x = 2 litres
IMO B
12 litre mixture: -
Milk = 12*2/5 = 4.8 litres
Water = 12*3/5 = 7.2 litres
Replaced mixture: -
Let x litres of mixture be replaced with milk
Milk = 4.8 - 2x/5 + x = 6
Water = 7.2 - 3x/5 = 6
x = 2 litres
IMO B
