Question

at what rate per annum will the principal triples in 16years

Answer 1

let the principle be x
therefore amount will be 3x as given in the question
as amount is equal to principle + simple interest
therefore 3x = x + s.i.
s.i.= 2x
now applying the formula of simple interest that is P×N×R/100
therefore 2x = x × 16 × R/100
after solving the above you will get 100/8
that is nearly 12.5

Answer 2

Answer:

12.5

Step-by-step explanation:

Let

Principal be x

So Amount is 3x

A = P + SI

3x = x + SI

2x = SI

SI = P×T×R/100

2x = x×16×R/100

12.5 = R

So, Our answer is 12.5