Answer:
18 litres of red paint is needed
Step-by-step explanation:
Given the ratio:
3 litres red paint : 2 litres blue paint
Determine how many litres of red paint is needed to make 30 litres of purple paint.
Since it takes 3 litres of red paint and 2 litres of blue paint to make 5 litres of purple paint, the red paint would be 3/5s of the 30 litres.
3/5 x 30 = 90/5
= 18 litres
Thus, 18 litres of red paint is needed to make 30 litres of purple paint.
