Question

in what ratio should water be mixed with soda costing Rs 12 per litreso as to make a profit of 25%by selling the diluted liquid at Rs 13.75 per litre?

Answer 1

first find the cost price of the mixture by using,
c.p=100/100+gain%*s.p
=100/100+25*13.75
=11
now,among water and soda,water is the cheaper quantity and the price is not given assume it as 0 rs,then simply
0 12
11
1 11
so required ratio is 1:11