# Ratio, Proportion and Percentages Puzzle – Challenge 25

Looking for incredibly challenging math and critical thinking puzzle? If so, then this math puzzle is just for you! Let's challenge your brain!

## Challenge:

20 liters of 40 percent antifreeze in fuel are mixed with 40 liters of 10 percent antifreeze in fuel. The percentage of antifreeze in the new solution is:

A- $$15\%$$

B- $$20\%$$

C- $$25\%$$

D- $$30\%$$

E- $$35\%$$

$11.99 Satisfied 123 Students The correct answer is B. The total amount of the mixture of two fuels is 60 liters. (20 liter plus 40 liters) Let’s find the total of the antifreeze. The sum of $$40\%$$ of 20 liters and $$10\%$$ of 40 liters is: $$0.40 × 20 + 0.10 × 40 = 8 + 4 = 12$$ Of 60 liters of the mixture, 12 liters are antifreeze. So, the percentage of antifreeze in the new solution is: $$12 ÷ 60 = 0.20 = 20\%$$ ### More math articles ### What people say about "Ratio, Proportion and Percentages Puzzle - Challenge 25"? No one replied yet. X 30% OFF Limited time only! Save Over 30% SAVE$5

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