Amal Roy deposits ₹2000 in the bank and Poshupoti Ghosh deposits ₹2000 in the post office at the same time. After 3 yrs. they get the return amounts ₹2360 and ₹2480 respectively. Let us write by calculating, the ratio of the rate of simple interest in percent per annum in the bank and that of in the post office.

If I get ₹1200 return as amount (principal along with interest) by depositing ₹800in the bankat the rate of simple interest of 10% per annum, then let us write by calculating, the time for which the money was deposited in the bank.

At the same rate of simple interest in percent per annum, if a principal becomes the amount of ₹7100 in 7 yrs. and of ₹6200 in 4 yrs., let us determine the principal and rate of simple interest in percent per annum.

A weaver Cooperative society takes a loan of ₹15,000 at the time of buying a power loom. After 5 yrs. the society has to repay ₹22125 for recovering the loan. Let us determine the rate of simple interest in percent per annum.

Aslamchacha got ₹1,00,00 when he retired from his service. He deposited some of that money in the bank and rest of his money in the post office and got ₹5400 in total per year as interest. If the rates of simple interest per annum in the and in the post office are 5% and 6%, respectively, then us write by calculating, the money he had deposited in the bank and post office.