Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 33)
A recipe states that to make a fruit drink, you need to mix fruit juice and water in a ratio of 2:5. What amount of juice is needed to be mixed with 100ml of water?
20 ml
25 ml
40 ml
50 ml
解释
Juice:water=2:5. Thus 100ml of water means multiply by 20. Thus 2*20=40ml