SSC GD 2025 PYQ — Question 52

SSC GD Const 2025 (English) - 13 Feb 2025 - Shift 3 • Quantitative Aptitude • Q52

When difference between compound and simple interest for three years is ₹155 at 10% interest per annum, the principal is ₹______.

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e. 5000.

Difference between CI and SI for 3 years = ₹155

Rate = 10% per annum

Time = 3 years

The difference (CI - SI) for 3 years = P × (R100\frac{R}{100})2(300+R100\frac{300+R}{100})

⇒ 155 =  P × (10100\frac{10}{100})2(300+10100\frac{300+10}{100})

⇒ 155 = P × (1/100)(31/10)

⇒ P = 5000