SSC CHSL Premium Mock 03 – Q060

Question:

The difference between compound interest and simple interest on a sum for 2 years at 12% per annum is Rs. 72. What is the sum?

किसी धनराशि पर 2 वर्ष के लिए 12% प्रति वर्ष की दर से चक्रवृद्धि ब्याज और साधारण ब्याज के बीच का अंतर 72 रुपये है। मूलधन क्या है?

Options:

  • Rs. 2,000
  • Rs. 2,500
  • Rs. 5,000
  • Rs. 4,000
  • 2,000 रुपये
  • 2,500 रुपये
  • 5,000 रुपये
  • 4,000 रुपये

Correct Answer: c)

Explanation:

For 2 years, \(\text{CI} – \text{SI} = P\left(\dfrac{r}{100}\right)^2\).
\(72 = P\left(\dfrac{12}{100}\right)^2 = P \times \dfrac{144}{10000}\)
\(P = \dfrac{72 \times 10000}{144} = \text{Rs. } 5,000\).

2 वर्ष के लिए सूत्र: \(\text{CI} – \text{SI} = P\left(\dfrac{r}{100}\right)^2\)
\(72 = P \times \dfrac{144}{10000} \implies P = \dfrac{720000}{144} = 5,000\) रुपये।

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