An amount of Rs 10000 is deposited in bank A for a certain number of years at a simple interest of 5% per
annum. On maturity, the total amount received is deposited in bank B for another 5 years at a simple
interest of 6% per annum. If the interests received from bank A and bank B are in the ratio 10 : 13, then the
investment period, in years, in bank A is
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Explanatory Answer
Interest from bank A = 10000*n*5 / 100 = 500n ( n is the Investment period, in years, in Bank A)
Interest from bank B = (10000*6*5/ 100) + (500n*6*5/100) = 3000 + 150n
Ratio of interest from Bank A and Bank B= 500n/ 3000 + 150n = 10/13
6500n = 30000 + 1500n
5000n = 30000
N = 30000/5000 = 6
Investment period, in years, in Bank A = 6
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