Multiple choice

Mukesh invested Rs.30000 in two different parts one at 15% SI and another one at 20% CI. At the end of two year he received total interest Rs.10750 then find the amount invested in SI?

  1. Rs.12500

  2. Rs.15500

  3. Rs.21500

  4. Rs.17500

  5. Rs.18500
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let x be the amount at 15% SI and (30000-x) at 20% CI. SI = 0.3x. CI = (30000-x) * ((1.2)^2 - 1) = (30000-x) * 0.44 = 13200 - 0.44x. Total interest = 0.3x + 13200 - 0.44x = 10750. 0.14x = 2450. x = 17500.

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