# Q. Calculate the time in which Rs. 5,000 would become Rs. 5,500 at an interest rate of 8% per annum. Q. In what time will money deposited in a bank double itself if rate of interest is $12\frac{1}{2}$ % p.a. Q. A sum of Rs. 4000 was borrowed on April 1 and repaid on Aug. 25 of the same year at an interest of $7\frac{1}{2}$% . What was the interest paid ?

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