Question

manjit is now 12 years old and mala is 2 years old. in how many years will manjibe 3 times as old as mala

Answer 1

present age of manjit = 12 years
present age of mala = 2 years.

let the number of year passed be x

ATQ,
12+x = 3(2+x)
12+x = 6+3x
3x-x = 12-6
2x = 6
x = 3

so, after 3 years, manjit's age will be 3 times mala's age.