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 ₹ 7, 930 is divided into 3 parts and given at loan at 5 % simple interest to A, B and C for 2, 3 and 4 years respectively. If the amounts of all three are equal after their respective periods of loan, then the A received a loan of 

What is the ratio of the simple interest earned on a certain amount at the rate of 21% per annum for 8 years to that earned on the same sum at the same rate for 21 years?  

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?

A certain amount of money earns Rs. 540 as simple interest in 3 years. If it earns a compound interest of Rs. 376.20 at the same rate of interest in 2 years, find the amount.

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.

After 4 years, the difference between principal and simple interest is Rs. 228 at the rate of 6 percent simple interest, so what is the amount of principal?