Question

the persent age of ram is 12 years and that of shyam is 24 years . how many year ago ram's age was 1/3rd of shyam

Answer 1

let x be the no. of years


12-x=1/3(24-x)
12-x=8-x/3
12-8=x-x/3
4=3x-x/3
4=2x/3
4×3/2=x
6=x

he was 6 years before 1/3rd of shyam

6=1/3×18
6=6
verified

Answer 2

let,x be the year when rams age was 1/3rd of shyam
given rams age=12
and sham age=24
12-x=1/3(24-x)
12-x=8-1x/3
12-8=x-1x/3
4=3x-1x/3
2x=4*3
x=12/2=6
so 6 yrs before rams age was 1/3rd of shyam