SSC CGL 2020 PYQ — Question 69

SSC CGL - 5th March 2020 Shift 1 • Quantitative Aptitude • Q69

The compound interest on a certain sum at  p.a. for 3 years is Rs.6,350. What will be the simple interest on the same sum at the same rate for years?

Show answer & explanation

Correct answer: A

Explanation

The correct answer is option 1 i.e Rs.10,200

Understanding Application
We will use concepts of compound interest and simple interest in the following question.

⇒ CI = P(1 + R / 100)n - P

⇒ 6350 = P(1 + 50 / 300)3 - P

⇒ P= 6350 × 216 / 127 

⇒ P = 10800

We know that,

SI = P × r × t / 100

⇒ SI = 10800 × (50 / 3) × (17 / 3) / 100

⇒ Rs. 10200