Multiple choice

The difference between the simple interest and compound interest at 20% per annum for 3 years is Rs.3200. Then what is the value of the sum? किसी निश्चित धनराशि पर 20% वार्षिक ब्याज की दर से 3 वर्षों के लिए साधारण ब्याज और चक्रवृद्धि ब्याज में अन्तर 3200 रु. है | तो उस धनराशि का मान क्या है ?

  1. Rs./रु.20000

  2. Rs./रु.24000

  3. Rs./रु.25000

  4. Rs./रु.30000
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For 3 years at 20%, difference = P(R/100)² × (300+R)/100 = P(20/100)² × 320/100 = P(0.04)(3.2) = 0.128P. Given 3200 = 0.128P, so P = 3200/0.128 = 25000.

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