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CI on a sum for 3 years given: SI on the same sum, rate and period

The same question, asked 2 times: 13 Sep 2025 S2*, 23 Sep 2025 S1. Every wording below, oldest first.

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  1. Question 1

    13 Sep 2025 S2

    61
    If the compound interest on a certain sum at 1623%16\frac{2}{3}\% per annum for 3 years is ₹1270, find the simple interest on the same sum at the same rate and for the same period.

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  2. Question 2

    23 Sep 2025 S1

    70
    The compound interest on a certain sum for 3 years at 20%20\% per annum is ₹864. Find the simple interest on the same sum at the same rate and period.

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