d If a dairyman has 300 pounds of milk testing 3% butterfat, how many pounds of skimmed milk (with no butterfat) must he remove to have milk testing 3.6% butterfat? | Job Exam Rare Mathematics (JEMrare) - Solved MCQs
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If a dairyman has 300 pounds of milk testing 3% butterfat, how many pounds of skimmed milk (with no butterfat) must he remove to have milk testing 3.6% butterfat?

Question : If a dairyman has 300 pounds of milk testing 3% butterfat, how many pounds of skimmed milk (with no butterfat) must he remove to have milk testing 3.6% butterfat?

Solution:

Given that 300 ponds of milk is testing 3 % of milk

It means;

3% of fats = 300 ponds of milk

or

1% of fats = 100 ponds of milk

Now let x% of fat be added to present value of fats so that it becomes 3.6% of fats

i-e

x+3=3.6

this gives  x=0.6% of fats

but 1% of fats =100 ponds of milk

so, 0.6% of fats = 0.6×100=60 ponds of milk

 

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