Question

the concentration of petrol in three different mixtures (petrol and kerosene) is 1/2, 3/5 and 4/5 respectively. if 2 liters, 3 liters and 1 liter are taken from these three different vessels and mixed. what is the ratio of petrol and kerosene in the new mixture?

Answer 1

Concentration of petrol in A$= 1 /2$

Concentration of petrol in B $= 3 /5$

Concentration of petrol in C $= 4/5$

Amount of petrol taken from A $= 2 litre from 3 litre$

Amount of petrol taken from B $= 3 litre from 8 litre$

Amount of petrol taken from C $= 1 litre from 9 litre$

Therefore, total petrol taken out from A, B and C = 2+3+1 =6 litres

So, the quantity of kerosen$=(3+8+9) - 6 = 14 litre$

Thus, the ratio of petrol to kerosene $= 6/ 14 = 3 /7$