Rajat opened a recurring deposit account in a branch of Central Bank of India and deposited $100$ every month for $3$ years. What rate of interest will yield an interest of $222$ on maturity?

The income (excluding house rent allowance) of a government employee in the financial year $2013-2014$ was $₹4,10,000$. He deposited $₹20,000$ as premium on life insurance policy and $₹4000$ every month in general provident fund. He also purchased a national savings certificate worth $₹25,000$. He donates$₹20,000$ to the Prime Minister's Relief Fund (which is $100\%$ tax free) and $₹12,000$ to Old Person's Home (which gets him $50\%$ tax rebate). Calculate the payable tax for him at the end of the year. A maximum of $₹1,00,000$ of savings (under any scheme) are permitted. The rates of tax are as follows:

$1.$ Educational cess $=2\%$ of payable tax

$2.$ Secondary and Higher education tax $=1\%$of payable tax

Naveen's income in the financial year $2013-2014$ was$₹7,20,000$. He deposited $₹20,000$ as premium on life insurance policy and $₹4000$ every month in general provident fund. He also purchased a national savings certificate worth $₹30,000$. He donates$₹15,000$ to an orphanage (which is $50\%$ tax rebate). Calculate the tax payable by him at the end of the year. 

The rates of tax are as follows:

$1.$ Educational cess $=2\%$ of payable tax

$2.$ Secondary and Higher education tax $=1\%$of payable tax

$3.$ A maximum of$₹1,00,000$ of savings (under any scheme) are permitted.