Question

3.
If the compound ratio of 7:5 and 8:x is 84:60. Find x.​

Answer 1

Answer:

We have,

Compound ratio of 7:5 and 8:x=84:60

7×x:5×8=84:60

7x:40=84:60

Product of extremes = product of means

⇒7x×60=40×84

⇒

60

40×84

=7x

7x=56

x=8

Hence, this is the answer.