At what rate percent per annum will Rs. 30000 amount to Rs. 36300 in 2 years, compound interest compounded annually? MCQ with Answer and Explanation

At what rate percent per annum will Rs. 30000 amount to Rs. 36300 in 2 years, compound interest compounded annually?
A. 12%
B. 14%
C. 10%
D. 8%
Answer: Option C
Solution (By JKSSB Mock Tests)
Amount/Principal = 36300 / 30000 = 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
What is the compound interest on Rs. 50000 for 1.5 years at 4% per annum, compounded half-yearly?
A. Rs. 3000.00
B. Rs. 3060.40
C. Rs. 3100.00
D. Rs. 3120.80

Correct Answer: Option B


Explanation:
Half-yearly rate = 4/2 = 2%. Time = 1.5 years = 3 half-years. Amount = 50000 * (1 + 2/100)^3 = 50000 * (1.02)^3 = 50000 * 1.061208 = Rs. 53060.40. Compound Interest = 53060.40 - 50000 = Rs. 3060.40.

This question belongs to: Maths Compound Interest
Question #2
A sum of money at compound interest amounts to Rs. 6655 in 3 years and to Rs. 7320.50 in 4 years. Find the rate of interest.
A. 11%
B. 9%
C. 8%
D. 10%

Correct Answer: Option D


Explanation:
Rate = (7320.50/6655 − 1) × 100 = (1.1 − 1) × 100 = 10%.

This question belongs to: Maths Compound Interest
Question #3
A sum of money placed at compound interest triples itself in 5 years. In how many years will it become 9 times of itself?
A. 15 years
B. 10 years
C. 12 years
D. 8 years

Correct Answer: Option B


Explanation:
The sum becomes 3^1 times in 5 years. It will become 9 (3^2) times in 2 * 5 = 10 years.

This question belongs to: Maths Compound Interest