Multiple choice

Suresh invested Rs.80000 in two different parts one at the rate of 20% CI per annum and another one at the rate of 15% SI per annum. If he interchanges the rate of interest he got Rs.2875 less at the end of two years, and then find the difference of the two sums

  1. Rs.20000

  2. Rs.24000

  3. Rs.12560

  4. Rs.14500

  5. Rs.17500
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A Correct answer
Explanation

Let sums be x and y. x+y = 80000. Case 1: x at 20% CI, y at 15% SI. Case 2: y at 20% CI, x at 15% SI. The difference in interest is 2875. Solving the algebraic difference between the two interest expressions leads to the difference in principal.

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