A baking recipe calls for 2.5 kg of sugar and 4.5 kg of flour. With this recipe some cakes were baked using 24.5 kg of a mixture of sugar and flour. How much sugar was used?
Worked solution (try it first)
The recipe uses sugar and flour in the ratio 2.5:4.5, which is 7 kg of mixture in all.
So sugar is 72.5 of any mixture: 72.5×24.5=2.5×3.5