A man borrows some amount at the rate of 12% per annum at simple interest. After 6 years 8 months, he paid 720 as an interest. Find the amount borrowed by him. 

The simple interest for four years is one fourth of the principal. At the same rate, which amount become Rs.450 total amount in 2 years?

A sum of ₹ 1750 is divided into two parts such that the interests on the first part at 8 % simple interest per annum and that on the other part at 6 % simple interest per annum are equal. The interest on each part (in rupees) is 

The simple interest of 7 years of money is Rs. 1750. If the rate of interest was 2% more per annum, how much interest would have been higher?

What would be the simple interest obtained on amount of Rs.6,535 at the rate of 10% Percent per annum after 6 years?

Find the simple interest on a principal of Rs.1250 at the rate of 5% for a time of 219 days.

A takes a loan of Rs. 1500 from a bank at the rate of 10% simple interest for 3 years and lends to B at the rate of 15% for the same time period. Find the overall profit of A in the whole transaction.

The difference between C.I and S.I for 2 years is Rs. 9. Find the sum (in Rs.) if the rate is 15% per annum.