Question 143
Two vessels contain mixture of petrol and kerosene in the ratio 4 : 3 and 3 : 5 respectively. The ratio of the volumes of the quantities from the two vessels to be mixed together so that the new mixture may contain same volume of petrol and kerosene is
Solution
Ratio of petrol and whole mixture in 1st vessel = $$\frac{4}{7}$$
Ratio of petrol and whole mixture in 2nd vessel = $$\frac{3}{8}$$
Also, ratio of petrol and whole mixture in the final mixture = $$\frac{1}{2}$$
By alligation method,
=> Petrol : Kerosene = $$\frac{1}{8}:\frac{1}{14}=14:8$$
= $$7:4$$
=> Ans - (D)
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