New question maths (At what rate percent per annum simple interest will treble itself in 16 years .

New question maths (At what rate percent per annum simple interest will treble itself in 16 years .
New question maths (At what rate percent per annum simple interest will treble itself in 16 years .
New question maths (At what rate percent per annum simple interest will treble itself in 16 years .

years