Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 21)
Two numbers are in the ratio 3:7. The difference between the two numbers is 16. Find the two numbers.
12 and 28
18 and 42
24 and 56
30 and 70
説明
Difference in ratio is 4. So 16/4=4. 3*4=12, 7*4=28