Question

4. At what rate would a sum of money becomes four times itself if invested for 2 years, compounded annually
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Answer 1

Answer:

Since it is compound interest, the Principal for the second year would be 2P. This again doubles itself in another year because Interest rate is 100%. So at the end of two years it becomes 4 P. Hence at an interest rate of 100% , the sum of money becomes 4 times itself.