Multiple choice

The rate of interest for first two years is 4%, for next 3 years is 5% and 8% for the period beyond 5 years. If the interest after 7 years is Rs. 1560. Find the principal?

  1. 3000

  2. 5000

  3. 2000

  4. 4000
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

माना मूलधन = P। पहले 2 वर्षों का ब्याज = P × 4% × 2 = 0.08P। अगले 3 वर्षों का ब्याज = P × 5% × 3 = 0.15P। शेष 2 वर्षों (कुल 7 वर्ष में से) का ब्याज = P × 8% × 2 = 0.16P। कुल ब्याज = 0.08P + 0.15P + 0.16P = 0.39P। दिया है: 0.39P = 1560, इसलिए P = 1560 / 0.39 = 4000। विकल्प D सही है।

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