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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 litre mixture so that the percentage of unleaded petrol becomes 5%?
1000 ml
900 ml
1800 ml
None of these
In 1 litre mixture, quantity of unleaded petrol = 100 ml
Let x ml leaded petrol be added, then 5% of (1000 + x) = 100 ml
5 (1000 + x ) = 100 × 100
⇒ x = 5000/5 = 1000 ml
By: Deepak Dawra ProfileResourcesReport error
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