Question

a what time will a sum of money double itself at 25% per annum​

Answer 1

Step-by-step explanation:

Given that the SI will become 2×principal

Let the sum of money be X.

Let time be y years.

interest=25% per annum.

SI=(principal×time×intreset rate)/100

2x=(x×y×25)/100

200x=25xy

y=200x/25x

y=8years