A petrol pump owner mixed leaded and unleaded petrol in such a way tha – InterviewSolution

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1.	A petrol pump owner mixed leaded and unleaded petrol in such a way that the maximum contains 10% unleaded petrol. What quantity of leaded petrol should be added to 1 litre mixture so that the percentage of unleaded petrol become 5% .
Answer» 1000 ml 900 ml 1900 ml 1800 ml Solution :(a) In 1 litre quantity of unlead petrol=10 ml LET x ml leaded petrol be added , then 5% of (1000+x)=100ml `or , 5(1000+x)=100 XX 100` `IMPLIES x=(5000)/(5)=1000 ml`

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