Question

the ages of hari and harry are in the ratio 5:7 four years from now the ratio of their ages will be 3:4. fond their present age.​

Answer 1

This is your answer. Hope it helps!!

Answer 2

Step-by-step explanation:

let age of Hari be x years

let age of Harry be y years

given ratio of their ages is 5:7

thus x:y=5:7 (or)

x/y=5/7 ----••• equation 1

four years from now

age of hari= x+4

age of Harry=y+4

Ratio is now 3:4

thus x+4 / y+4 = 3/4

cross multiply

4x+16=3y+12

4x+4=3y ( but from equation 1; x=5y/7 )

4(5y/7)+4=3y

20y/7+4=3y

4=3y-20y/7

4=21y-20y/7

4=y/7

so y = 28 years

and x=5*28/7=20 years

so present ages of Hari and Harry are 28 and 20 years respectively