A man borrowed \(Rs. \ 30000\) from Punjab National Bank to buy a tractor. Find the amount he would pay after \(2\frac {1}{2}\) years at \(17\%\) per annum.
Sanjay borrowed \(Rs.\ 3000\) from a bank at \(9\%\) per annum for \(2\) years. He lent this sum of money to Manoj at \(12\%\) per annum for the same period. How much did Sanjay gain in this transaction?