4. Prahalad invests a sum of money in a bank and gets Rs 3307.5 and Rs3472.87 in and 3rd years respectively. Find the sum he invested.
+
4. Prahalad invests a sum of money in a bank and gets Rs 3307.5 and Rs3472.87 in and 3rd years respectively. Find the sum he invested.[KOER/en/index.php/Banking#Hints_for_difficult_problems]click