Question

sindh is 40 years old and smita is 20 years old. how many years ago was sindhu 3 times as old as smita

Answer 1

Let she was 3times before x years,

So,

40 - x = 3(20 - x)

40 - x = 60 - 3x

3x - x = 60 - 40

2x = 20

x=20/2
x = 10


It means that she was 3 times of sindhi's age before 10 years.