Latest IBM Aptitude Question SOLUTION: There is 20 litre solution containing 10% water and 90% spirit. How much water should be added to make the solution containing 25% water?

• Placement Papers
• /
• IBM
• /
• Numerical Ability
• /
• Alligation or Mixture

IBM Question Papers: IBM Interview Experience(49) IBM Company Profile

(#M40004154) IBM Numerical Ability question Allegation or mixtures Keep an EYE

There is 20 litre solution containing 10% water and 90%
spirit. How much water should be added to make the solution
containing 25% water?

Asked In IBM (12 years ago)

Unsolved Read Solution (6)

Is this Puzzle helpful?   (16)   (1) Submit Your Solution Alligation or Mixture

Read Solution (6) :

prawin kumar singh  (11 years ago)

(20+x)*25/100=(2+x)
so x=4

Is this solution Helpfull? Yes (18) | No (6)  

Richi Sharma  (10 years ago)

this problem can easily be solved using allegation...
solution containing 10% of water has to be mixed with solution containing 100% water

10% 100%
25%
75% 15% therefore the ratio is 5:1... that is fr 5 parts of 10% solution we have to add 1 part of 100% solution.

(20/5)*1 = 4ltrs

Is this solution Helpfull? Yes (4) | No   

Piyush  (10 years ago)

25x20/100= 5 Ltr.

Is this solution Helpfull? Yes (2) | No (1)  

ramakant soni  (9 years ago)

10% (20) = 2
(2 + x)/( 20+ x) = 25/100
so x = 4 litre

Is this solution Helpfull? Yes | No   

bhagyashri  (7 years ago)

water...(10/100)*20 = 2 liter
2 lit..............................10/100
???....................................25/100
so ?*10/100 = 2*25/100
answer is 5 but out of 5 liters we should add 3 liters to make the solution containing 25% of water

proof: already it has 10% water + (3/20)*100.............15% =25%

Is this solution Helpfull? Yes | No   

bhagyashri  (7 years ago)

Sorry.. I think answer 3 lit is wrong because once extra water is added to the solution then automatically solution level will be increased
I calculated with out incrementing the solution level
20 lit + x.................... 100
2 lit + x....................... 25
25(20+x) = 100(2+x)
X = 4 lit

Is this solution Helpfull? Yes | No   

Please Login to Read Solution.