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11 November, 19:40

White paint costs £2.80 per litre. blue paint costs £3.50 per litre. white paint and blue paint are mixed in the ratio 3:2. work out the cost of 18 litres of the mixture

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  1. 11 November, 20:03
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    There are five parts to the ratio:

    18 : 5 is 3.6.

    Therefore you need 10.8l of white paint and 7.2l of blue paint.

    10.8l * 2.80 = £30.24

    7.2l * 3.50 = £25.20

    The total is £55.44
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