Mathematics for IGCSE & O level - Ratio And Proportion (Section 3 - No. 8)
A quantity of bag of sugar is enough to feed 12 humans for 25 days. How long would the same quantity of sugar feed 30 humans?
8 days
10 days
12 days
15 days
คำอธิบาย
The amount of sugar per day per person is constant. Thus the time will decrease with an increase of people. 12*25=30*x. Therefore, x=10