Question

a sum of money put at simple interest triples itself in 15 years the rate percent is​

Answer 1

Answer:

The formula for simple interest calculation is -

I = P*R*T/100

Where I is interest

P is principal amount

R is rate of interest

T is time in Years.

Now you want to triple the money. That means I = 2P

Hence 2P = P*R*T/100

2*100 = 15*T

Hence T = 200/15 = 13.33Y or 13Y and 4 months.

So the answer for your question is 13Y and 4 months.

Answer 2

Answer:

Step-by-step explanation:

Rs. 100 becomes Rs. 300 in 15 years 6 months.

An interest of Rs. 200 is earned on Rs. 100 in 15 years, 16 months.

An interest of Rs. 100 is earned in 7 years and 9 months.

So, a sum of money doubles itself in 7 years 9 months.