Question 420411

let your age =x and sister age = y

difference between ages i.e x - y = 12

( the difference between age of two always remain same)


and according to question,  x = 3y


so, 3y -y = 12

=> 2y = 12

=> y = 12/2  = 6

x = 18

your age = 18, sister age = 6