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22 January, 12:09

Purple paint is made by mixing red paint and blue paint in the ratio 2 : 3. If 15 litres of blue paint is used, how much red paint will be needed?

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Answers (2)
  1. 22 January, 13:54
    0
    10 liters

    Step-by-step explanation:

    Red : Blue

    2 3

    We want 15 blue liters

    15/3 = 5

    Multiply each term by 5

    Red : Blue

    2*5 3*5

    10 : 15
  2. 22 January, 14:46
    0
    Because they are in the ratio 2:3 we'll call red and blue paint 2x and 3x respectively. We know that there are 15 liters of blue paint which means that 3x = 15. Solving for x we get x = 5. Since red paint is denoted by 2x it would be 2 * x = 2 * 5 = 10.
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