Question

Sushma is now 15 years older than Vijay but in 3 more years Sushma will be 8 times as old as Vijay was 3 years ago.how old are they now

Answer 1

let the present age of sushma be x
let the present age of vijay be y
by A.T.Q
x=y+15...............i
x+3=8 (y-3)........ii
y+15+3=8 (y-3) (from i )
y+18=8y-24
8y-y=18+24
7y=42
y=42/7
y=6
putting the value of y in eq. i
x=6+15
x=21