7yr ago, the ages of A and B were in the ratio 4 : 5 and 7 yr hence, they f B is
Answers
Answered by
1
Answer:
Let A and B be the present ages
SEVEN YEARS AGO
(A-7)/(B-7)=4/5
5A-35=4B-28
5A-4B=7 [Eq.1]
SEVEN YEARS HENCE
(A+7)/(B+7)=5/6
6A+42=5B+35
6A-5B=-7 [Eq.2]
USING Eq.1and Eq.2
A=63 , B=77 are the present ages in years
Similar questions