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White paint cost £2.80 a litre. Blue paint cost £3.50 a litre. White and blue paint are mixed in the ratio 3:2. How much is the cost of 5 litres if the mixture?
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White paint cost £2.80 a litre.

Blue paint cost £3.50 a litre.
White and blue paint are mixed in the ratio 3:2.
How much is the cost of 5 litres if the mixture?

User Benson Lin
by
7.5k points

1 Answer

4 votes
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
User Rognon
by
8.0k points
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