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A petrol pump owner mixed leaded and unleaded petrol in such a way that the mixture contains 10 % unleaded petrol. What quantity of leaded petrol should be added to 1 liter mixtures, so that the percentage of unleaded petrol becomes 5 % ?
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- 1000 ml
- 900 ml
- 1900 ml
- 1800 ml
Correct Option: A
Here we have to find the quantity of leaded petrol.
Hence, we have to make certain changes in the given
data.
% of leaded petrol in the mixture = 100 – 10 = 90%
After addition of leaded petrol (that has to be calculated) percentage of leaded petrol becomes (100 – 5) = 95%
Now, applying the given theorem,
| we have the required answer = |  |  | x 1000 ml = 1000 ml | 100 – 95 |
Hence , required answer is 1000 ml .
