A. 3
B. 4
C. 5
D. 6
Explanation:
P(1 + 20/100)n > 2P or (6/5)n > 2
Now, (6/5 * 6/5 * 6/5 * 6/5) > 2. So, n = 4 years.
Related Mcqs:
- A man invests a certain sum of money at 6% per annum simple interest and another sum at 7% per annum simple interest. His income from interest after 2 years was Rs. 354. One-forth of the first sum is equal to one-fifth of the second sum. The total sum invested was :
A. Rs.3100
B. Rs.2700
C. Rs.2200
D. Rs.1800 - Find the least number of complete years in which a sum of money put out at 25% compound interest will be more than double of itself?
A. 6 years
B. 1 year
C. 2 years
D. 4 years - The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 1. The sum (in Rs. ) is_________?
A. 625
B. 630
C. 640
D. 650 - The difference between simple and compound interest (compounded-annually) on a sum of money for 2 years at 10% per annum is Rs 65. The sum is_________?
A. Rs 6500
B. Rs 6565
C. Rs 65065
D. Rs 65650 - Find the sum The difference between the compound and S.I. on a certain sum of money for 2 years at 10% per annum is Rs.15of money?
A. 1500
B. 1800
C. 2100
D. 1950 - A and B together take 6 days to complete a task. B and C together take 12 days to complete the same task. A and C together take 8 days to complete it. If A, B and C are working together, how long does it take for them to complete the task?
A. 4(2/3) days
B. 4 days
C. 5(1/3) days
D. 1(1/3) days - C takes 6 days to complete half of a work and D takes 5 days to complete 1/3rd of the same work. They take turns to complete the task. If C works for the first 4 days, in how many days will D complete the rest of the work without the help of C?
A. 10 days
B. 12 days
C. 8 days
D. 9 days - A sum amounts to Rs. 2916 in 2 years and to Rs.3149.28 in 3 years at compound Interest. The sum is_________?
A. Rs.1500
B. Rs.2000
C. Rs.2500
D. Rs.3000 - The S.I. on a certain sum of money for 3 years at 8% per annum is half the C.I. on Rs. 4000 for 2 years at 10% per annum. The sum placed on S.I. is________?
A. Rs. 1550
B. Rs. 1650
C. Rs. 1750
D. Rs. 2000 - A sum of money becomes Rs.6690 after three years and Rs.10.035 after six years on compound interest. The sum is________?
A. Rs.4400
B. Rs.4445
C. Rs.4460
D. Rs.4520
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