Questions on rate of interest

find the rate of interest

A sum of money becomes 8/5 of itself in 5 years at a cartain rate of simple interest find the rate of interest

A sum of money becomes 4/3 of itself in 6 years at a cartain rate of simple interest find the rate of interest.

A certain sum of money doubles itself & number of years is equal to rate of interest. Find the rate of interest.

A sum becomes 1.6 times of itself in five years at simple rate of interest. Find rate of interest per annum?

For fixed time period and rate of interest, the simple interest is directly proportional to the principal

Simple interest of some money for 2 years at 10% rate ofinterest per annum is Rs.1200 . What is the difference in compound interest and simple interest if the rate of interest,time and Principal amount remains the same?

If simple interest on Rs. 400 is 256 and the rate of interest per annum equal to the number of years, then find the rate of interest.

The compoud interest on Rs 1000 is Rs 331 for 3 years at certain rate of interest, what is the rate of interest.