Latest Capgemini Aptitude Question SOLUTION: A certain quantity of petrol is found to be adulterated to the extent of 10%. What proportion of the adulterated petrol should be replaced with pure petrol to take the purity level

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A certain quantity of petrol is found to be adulterated to the extent of 10%. What proportion of the adulterated petrol should be replaced with pure petrol to take the purity level to 98%?

(a) 80% (b) 32% (c) 66.67% (d) cannot be determined.

Asked In Capgemini (12 years ago)

Unsolved Read Solution (6)

Is this Puzzle helpful?   (23)   (13) Submit Your Solution Alligation or Mixture

Read Solution (6) :

manas kumar dalai  (11 years ago)

we have to get 98% purity.
let x ltr pure petrol is added and the volume becomes 100ltr.
so;
petrol solution
x+9/100(100-x)=98 (98 is the purity level in the final solution)
=>x+90-0.9x=98
=>x=80
so 80 ltr of pure petrol is added to the adulterated solution.

Is this solution Helpfull? Yes (36) | No (19)  

Jay Mukherjee  (9 years ago)

let us assume entire quantity of petrol is 100 now 10% is adulterated .remaining pure quantity is 90 and adulterated portion is 10..to take the purity level to 98% we should add 8 more.but percentage should be taken of the adulterated portion ie 8*100/10=80 %

Is this solution Helpfull? Yes (17) | No (2)  

saurabh mishra  (11 years ago)

Ans is 80%

Is this solution Helpfull? Yes (7) | No (24)  

Dheeraj Kumar Yama  (11 years ago)

can some one give a solution for this?

Is this solution Helpfull? Yes (3) | No (15)  

ANUSHA   (11 years ago)

ans is 80 percentage

Is this solution Helpfull? Yes (3) | No (9)  

vishal  (7 years ago)

we have to get purity level as 98% so let us consider only purity in both RHS and LHS
let X be the amount which is replaced. so, X is 100% pure which is only petrol. As it is replaced that means, we have (100-X) litres which are 90% pure. so the equation becomes
X+(100-X)0.9=0.98
x=80
now this is proportion of previous 100 litres
so 80/100*100= 80%

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

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