find the pair of linear equations and then solve them
Asked by | 27th Apr, 2008, 10:26: PM
Let x litres of 1st solution is taken.
and y litres of 2nd solution is taken.
Since, 10 litres of new solution is to be made, thus, first linear equation will be :
x + y = 10.
Now, 1st solution has 50% acid and 2nd solution has 25% acid. new solution has to be 40% acidic.
Thus, 2nd linear equation will be:
50% of x + 25% of y = 40% of 10
x/2 +y/4 = 4.
so, the 2 linear equations formed are:
x+y = 10
x/2 +y/4 = 4
solving for x and y, we get x= 6 and y = 4
so, we have to use 6 litres of 1st solution and 4 litres of 2nd solution to make the new solution.
Answered by | 10th Jul, 2008, 12:27: PM
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