UPSKILL MATH PLUS

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Arun lent \(₹5000\) to Balaji for \(2\) years and \(₹3000\) to Charles for \(4\) years on simple interest at the same rate of interest and received \(₹2200\) in all from both of them as interest. Find the rate of interest per year.
 
Rate of interest \(=\) \(\%\)