Examples on Ratios 2
In this class, We discuss Examples on Ratios 2.
The reader should have prior knowledge of ratios and basic examples. Click Here.
Example 1:
If A: B = 5: 7 and B: C = 6: 11, then A: B: C =?
Solution:
A: B = 5: 7
B: C = 6: 11
Make B equal in both ratios.
B: C = 6*7/6: 11* 7/6
B: C = 7: 77/6
A: B: C = 5: 7: 77/6
= 30: 42: 77
Example 2:
If A: B = 8: 15, B: C = 5: 8, and C: D = 4: 5, then A: D =?
Solution:
A: B = 8: 15
B: C = 5: 8
= 5*3: 8*3
= 15: 24
C: D = 4: 5
= 4*6: 5*6
= 24: 30
A: B: C: D = 8: 15: 24: 30
A: D = 8: 30
= 4: 15
Another Way:
A/B = 8/15
B/C = 5/8
C/D = 4/5
A/D = A/B * B/C * C/D
= 8/15 * 5/8 * 4/5
= 4: 15
Example 3:
If 10% of x = 20% of y, then the ratio of x: y =?
Solution:
10x/100 = 20y/100
x/10 = y/5
x/y = 2/1
x: y = 2: 1