Question

A mixture contains chemical x and chemical y ratio 4:3 if 5l of chemical y is added to the mixture, the ratio becomes 4:5 what is the quantity of chemical x in the given mixture in litres

Answer 1

Let the amount of chemical x be a.

The amount of chemical y will be :

3/4a

When we add 5 litres of y we now have :

(3/4a + 5) litres

The new ratio is :

a : (3/4a + 5) = 4 : 5

a / (3/4a + 5) = 4/5

5a = (3/4a + 5)× 4

5a = 3a + 20

5a - 3a = 20

2a = 20

a = 10 litres.

The answer is :

10 litres.