Question

the ratio of.
present age rehana and her mother is 2:7 after 2 years the ratio 1:3 what is rehana present age

Answer 1

let present age of rehana and her mother be 2x and 7x

2x+2/7x+2=1/3

6x+6=7x+2

x=4

therefore present age of rehana is 4

Answer 2

let common multiple of ages be X
2x+2/7x+2=1/3
3(2x+2)=7x+2
6x+6=7x+2
6-2=7x-6x
X=4
2x=2(4)=8

ans:- rehana's age is 8 years