The compound and the simple interests on a certain sum at the same rate of inte

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Question

The compound and the simple interests on a certain sum at the same rate of interest for two years are Rs.11730 and Rs.10200 respectively. Find the sum.

Answer: Option B

The simple interest for the first year is 10200/2 is Rs.5100 and compound interest for first year also is Rs.5100.
The compound interest for second year on Rs.5100 for one year So rate of the interest = (100 * 1530)/ (5100 * 1) = 30% p.a. So P = (100 * 10200)/ (30 * 2) = Rs.17000

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