Question

one quality of wheat costing rs.9.30 per kg is mixed with another quality of wheat costing rs.10.80 per kg then what will be the ratio in which they must be mixed so that the net cost isrs 10 perkg

Answer 1

Let the amount of wheat costing rs 9.30 be x

The amount of wheat costing rs 10.80 be y

The total cost of the mixture is :

9.30x + 10.80x = 10(x + y)

9.30x + 10.80y = 10x + 10y

10.80y - 10y = 10x - 9.30x

0.8y = 0.7x

8y = 7x

8/7 = x/y

The ratio is thus 8 : 7