In how many years will Rs. 3600 amount to Rs. 3969 at 5% per annum compound interest? MCQ with Answer and Explanation

In how many years will Rs. 3600 amount to Rs. 3969 at 5% per annum compound interest?
A. 1.5 years
B. 2.5 years
C. 3 years
D. 2 years
Answer: Option D
Solution (By JKSSB Mock Tests)
3600(1.05)^t = 3969 ⇒ (1.05)^t = 1.1025 ⇒ t = 2.

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Practice More Compound Interest Questions

Question #1
The compound interest on a sum for 2 years at 8% is Rs. 665.60. The sum is:
A. Rs. 4000
B. Rs. 4200
C. Rs. 3800
D. Rs. 4400

Correct Answer: Option A


Explanation:
CI = P × 0.1664 = 665.60 ⇒ P = 665.60 / 0.1664 = 4000.

This question belongs to: Maths Compound Interest
Question #2
A sum of money amounts to Rs. 10816 in 2 years and Rs. 11248.64 in 3 years at compound interest. Find the sum.
A. Rs. 10500
B. Rs. 9500
C. Rs. 9000
D. Rs. 10000

Correct Answer: Option D


Explanation:
Rate = (11248.64/10816 − 1) × 100 = 4%. P = 10816 / (1.04)² = 10000.

This question belongs to: Maths Compound Interest
Question #3
The compound interest on a certain sum of money for 2 years at 5% per annum is Rs. 410. What would be the simple interest on the same sum at the same rate for the same time?
A. Rs. 390
B. Rs. 400
C. Rs. 408
D. Rs. 405

Correct Answer: Option B


Explanation:
Effective rate of compound interest for 2 years at 5% = 5 + 5 + (55)/100 = 10.25%. Simple interest rate = 5 * 2 = 10%. Given 10.25% of sum = 410 => 1% of sum = 40. Simple Interest = 10% of sum = 10 * 40 = Rs. 400.

This question belongs to: Maths Compound Interest