A 10 kg dry mixture is composed of 40 % sugar and rest salt. How much sugar (in kg) must be added to this mixture so that salt and sugar are in same proportion?  Choose one.
A) 2
B) 3
C) 5
D) 7
E) 8
Total mass of the mixture is 10 kg out of which sugar is 40 %, means the mass of the sugar is 4 kg and the rest is salt, this means the salt content is 6 kg.   Suppose x kg of sugar is added so as to equalise the proportion of salt and sugar in the mixture.   After adding x kg sugar, the sugar content becomes (4 + x) kg and the salt content is the same 6 kg.   Now in the new mixture we desire the salt and sugar content to be same, this means we want their masses to be same.   This means ( 4 + x ) = 6   Solving we get x = 2.   2ns 2
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A 10 kg dry mixture is composed of 40 % sugar and rest salt. How much sugar (in kg) must be added to this mixture so that salt and sugar are in same proportion?