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Q.
The concentration of petrol in three different mixtures (petrol and kerosene) is 1/2 , 3/5 and 4/5 respectively. If 2 litres, 3 litres and 1 litre are taken from these three different vessels and mixed. what is the ratio of petrol and kerosene in the new mixture?
A.
4:5
B.
3:2
C.
3:5
D.
2:3
View Answer
Correct choice: B
Explanation:
Concentration of petrol in A B C 1/2 3/5 4/5 Quantity of petrol taken from A = 1 litre out of 2 litre Quantity of petrol taken from B = 1.8litre out of 3 litre Quantity of petrol taken from C = 0.8 litre out of 1 litre Therefore, total petrol taken out from A, B and C = 1+1.8+0.8 =3.6 litres So, the quantity of kerosen =(2+3+1) - 3.6 =2.4 litre Thus, the ratio of petrol to kerosene = 3.6/2.4 = 3/2
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