Question

Eight years ago ravis age was 3/4 of parmods . Four years hence ravis age qill be 6/7 of parmods age . Find their percent ages

Answer 1

20, 24

Step-by-step explanation:

let their present ages are x (Ravi)& y (pramod)

8 yrs ago ,

(x - 8) = 3/4* (y - 8)

4x - 3y = 8 --(1)

after 4 yrs , (x + 4) = 6/7 * (y + 4)

7x - 6y = - 4 ..-(2)

on multiplying (1) by7 & (2) by (4) & subtracting the obtained equations[(1) - (2)] then we will have

3y = 72 => y = 24 yrs (pramod)&

x = 20 yrs old (Ravi )