Anonymous
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Asked: 2021-12-22T14:01:37+05:30 Category: Number Puzzles

In how many years a certain sum will become double itself at 5% interest per annum.

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    1 Answer

    1. Guru

      Explanation:

      Let the sum be Rs. 100

      Amount :100 + 100 = Rs.200

      Interest Rs.200 – 100 = Rs.100

      Use the formula N=100×I\PN

      N=100×100\100×5 = 20 years.

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