[" 101.The simple interest at "x%" for "x" years will "],[" be "x" on a principal of "]

The simple interest at x% for x years will be Rs. x on a sum of:

The Simple interest at x% per annum for x years will be ₹ x on a sum of

The Simple interest at x% per annum for x years will be ₹ x on a sum of

If the total interest becomes ₹ a for any principal having the rate of simple interest of a% per annum for a years, then the principal will be

If the simple interest on a certain sum of money for 2 years is one-fifth of the principal, then find the rate of interest per annum.