Question

3.
If the compound ratio of 7:5 and 8:x is 84:60. Find x.
4.
The compound ratio of 3:4 and the inverse ratio of 4:5 is 45:x. Find x.
please answer the question ​

Answer 1

Answer:

(7/5)/(8/x)=84/60

(7x/5×8)=84/60

7x=(84/60)×5×8

x=8