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):
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Answer by MathTherapy(10552) (Show Source):
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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