SOLUTION: How many kg of wheat selling at Rs. 5.20 per kg should be mixed with wheat selling at 4.40 per kg to make a mixture of 30 kg selling at Rs. 144.80 ?

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Question 993865: How many kg of wheat selling at Rs. 5.20 per kg should be mixed with wheat selling at 4.40 per kg to make a mixture of 30 kg selling at Rs. 144.80 ?
Found 2 solutions by addingup, MathTherapy:
Answer by addingup(3677)   (Show Source): You can put this solution on YOUR website!
See the attached picture for the answer
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

How many kg of wheat selling at Rs. 5.20 per kg should be mixed with wheat selling at 4.40 per kg to make a mixture of 30 kg selling at Rs. 144.80 ?
Let amount of Rs. 5.20 wheat to mix, be F

Then amount of Rs. 4.40 wheat to mix = 30 - F

We then get the equation: 5.2F + 4.4(30 - F) = 144.8

5.2F + 132 - 4.4F = 144.8

5.2F - 4.4F = 144.8 - 132

.8F = 12.8

F, or amount of Rs. 5.20-wheat to mix = , or  kg

Amount of Rs.-4.40 wheat to mix: 30 - 16, or  kg 

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