islabeaufisher1 islabeaufisher1 16-02-2024 Mathematics contestada Liz makes a large amount of purple paint by mixing red and blue paint in the ratio 3:7. Red paint costs £20 for a 3 litre tin. Blue paint costs £30 per 3 litres. Liz wants to make 30 litres of purple paint. Work out how much it will cost her.