A man invested a certain amount of sum at 12.5% per annum simple interest and earned an interest of Rs.2200 after 4 years. If the same amount is invested at 10% per annum compound interest, compounded annually for two years, then find the interest.
Let the certain sum of money be Rs.P. So,P x 0.125 x 4 = 2200 => P = Rs.4400 Desired interest = [(1.1)2– 1] x 4400 = Rs.924
Two times a number, added to the square of that number, gives 3. What could be the possible answer for this number?
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