Question

at what rate percent per annum will a sum of money triple in 16 years​

Answer 1

Let,

SUM = Rs X and RATE = r%.

TIME (t) = 16 years.

Since,

X tripled in 16 years,

INTEREST (I) = Rs (3X - X) = Rs 2X.

Now,

I = (S × t × r) / 100 2X = (X × 16 × r) / 100

r = 50/4

Rate = 12.5%

Hope it helps you .....