Question
A mixture contains salt and water
in the ratio of 2:5 respectively. If the ratio of the cost of salt and that of the mixture of salt and water is 9:4, then find the ratio of the cost of salt to that of water.Solution
ATQ, Let the cost of salt, cost of mixture, and cost of water be 9x, 4x, and y respectively. CP of Salt       CP of Water 9x                y        4x (4x − y)            5x (4x − y)/5x = 2/5 20x − 5y = 10x 10x = 5y = x/y = 1/2 Ratio of cost of salt to that of water = 9x:y = 9(1):2 = 9:2
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