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If a mixture of 90 liters contains 10% oil, how much oil is in the mixture?

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Question: If a mixture of 90 liters contains 10% oil, how much oil is in the mixture?

Options:

  1. 5 liters
  2. 7 liters
  3. 9 liters
  4. 10 liters

Correct Answer: 9 liters

Solution: 

10% of 90 liters = (10/100) * 90 = 9 liters of oil.

If a mixture of 90 liters contains 10% oil, how much oil is in the mixture?

Practice Questions

Q1
If a mixture of 90 liters contains 10% oil, how much oil is in the mixture?
  1. 5 liters
  2. 7 liters
  3. 9 liters
  4. 10 liters

Questions & Step-by-Step Solutions

If a mixture of 90 liters contains 10% oil, how much oil is in the mixture?
  • Step 1: Understand that 10% means 10 out of every 100 parts.
  • Step 2: We have a total of 90 liters in the mixture.
  • Step 3: To find out how much oil is in the mixture, we need to calculate 10% of 90 liters.
  • Step 4: Convert 10% to a fraction: 10% = 10/100.
  • Step 5: Multiply the fraction by the total amount: (10/100) * 90.
  • Step 6: Calculate the multiplication: (10 * 90) / 100 = 900 / 100 = 9.
  • Step 7: Therefore, there are 9 liters of oil in the mixture.
  • Percentage Calculation – Understanding how to calculate a percentage of a total quantity.
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