Karan deposited a certain sum in a bank at `6%` per annum. The bank increases the rate of interest from `6%` to `7%`. Karan deposits `₹4000` more in his account. The annual interest received by him now is `₹380` more than before. Find his original deposit.

Arun has a certain sum deposited in a bank at 5% per annum. The bank increases the rate of interest from 5% to 6% . Arun deposits ₹2000 more in his account. The annual interest received by him now is ₹220 more than before. Find his original deposite.

Prem has deposited some mony in a bank 4% per annum. The bank increases the interest rate by 1% p.a. and Prem deposits an additional ₹3000 in his account. The annual interest he receives at the year end is ₹220 more that what he would have received if the bank had not increased the interest rate and had not deposited additional amount. Find the original deposite.

Malti has deposited certain sum in a bank at 3.5% per annum. The bank announces an increase in the interest rate by 1.5% p.a. Malti deposits an additional ₹2500 in the bank. The annual interest that Malti receives now is ₹221 , more than what she would have got earlier. Find the original deposite.

Puri had invested a certain sum of money in a bank at 4.5% per annum. The bank reduced the rate of interest by 0.5% p.a. Puri withdrew ₹4,000 from his account. At the end of the year, the interest he got was ₹200 less than what he would have got had the bank not reduced the interest rate and he had not withdrew ₹4000 . Find the original deposite.

Mr. Sharma deposited Rs. 20000 as a fixed deposit in a bank at 10% per annum. If 30% is deducted as income tax on the interest earned, find his annual income.

A sum of Rs. 400 is lent for 3 years at the rate of 6% per annum. Find the interest.

Pramod deposits ₹ 600 per month in a Recurring Deposit Account for 4 years. If the rate of interest is 8% per year, calculate the maturity value of his account.

A sum when reckoned at 6% per annum simple interest amounts to Rs. 4130 in 3 years. Find the sum.