Question
A tank initially contains a water-alcohol mixture in a
7:3 ratio. After removing 20 liters of the mixture and replacing it with pure alcohol, the ratio becomes 1:1. Determine the tank's total capacity.Solution
SOLUTION: Let initially container contains 7x liters of water and 3x liters of alcohol After 20 liters of this mixture are replaced with alcohol then, 
 = 1/1 
 = 1/1 Cross-multiplying- 70x-140 = 30x+140 40x = 280 x = 7 the total volume of the tank = 10x = 70 liter
Which two numbers and two signs should be interchanged in the following equation to make it correct?
22 - 8 + 12 x 6 + 20 = 104
Statements: F ≥ G < E, G > D ≥ C = N
Conclusions: Â Â Â Â
 I. E > N
II. F > D
What was the day of the week on 24 August 1923?
Seven persons G, H, I, J, K, L, and M have different heights. H is taller than J. H is taller than G, who is just shorter than J. L is shorter than M. O...
If 6 $ 4 $ 7 = 101 and 2 $ 5 $ 11 = 150, then what is the value of T in T $ 8 $ 9 = 289?
Statement:
Some P are Q
Some R are S
No Q is R
Conclusion:
I. Some S are P
II. No P is S
...Select the correct mirror image of the given figure when the mirror is placed to the right side of the f igure at ‘XY ’.
In a certain code, VANILLA is written as XXPFNIC. How is CARPENTER written in that code?
____ is the mother of E.
