Question

1.A sum of money placed at compound interest doubles itself in 5 years. Find the
time it will amount to eight times itself.

2. A sum of money put at compound interest amounts to 2809 in 2 years and to
2977.54 in 3 years. Find the rate of interest and the sum.​

Answer 1

Step-by-step explanation:

please refer the book

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Answer 2

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