At what rate percent per annum will Rs. 20000 amount to Rs. 24200 in 2 years, compound interest compounded annually? MCQ with Answer and Explanation

At what rate percent per annum will Rs. 20000 amount to Rs. 24200 in 2 years, compound interest compounded annually?
A. 10%
B. 12%
C. 8%
D. 14%
Answer: Option A
Solution (By JKSSB Mock Tests)
Amount/Principal = 24200 / 20000 = 121 / 100 = (11 / 10)^2. Therefore, 1 + R/100 = 11/10 => R/100 = 1/10 => R = 10%.

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Practice More Compound Interest Questions

Question #1
The compound interest on a certain sum of money for 2 years at 10% per annum is Rs. 1050. What would be the simple interest on the same sum at the same rate for the same time?
A. Rs. 1025
B. Rs. 1040
C. Rs. 1000
D. Rs. 950

Correct Answer: Option C


Explanation:
Effective rate of compound interest for 2 years at 10% = 10 + 10 + (1010)/100 = 21%. Simple interest rate = 10 * 2 = 20%. Given 21% of sum = 1050 => 1% of sum = 50. Simple Interest = 20% of sum = 20 * 50 = Rs. 1000.

This question belongs to: Maths Compound Interest
Question #2
A sum becomes Rs. 6615 in 2 years and Rs. 6945.75 in 3 years at compound interest. Find the sum.
A. Rs. 5800
B. Rs. 6000
C. Rs. 6400
D. Rs. 6200

Correct Answer: Option B


Explanation:
Rate = (6945.75/6615 − 1) × 100 = 5%. P = 6615 / (1.05)² = 6615 / 1.1025 = 6000.

This question belongs to: Maths Compound Interest
Question #3
The difference between CI and SI on Rs. 2000 for 2 years at 4% per annum is:
A. Rs. 3.20
B. Rs. 4.00
C. Rs. 3.60
D. Rs. 4.80

Correct Answer: Option A


Explanation:
D = 2000 × (0.04)² = 2000 × 0.0016 = Rs. 3.20.

This question belongs to: Maths Compound Interest