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- Question
The difference between simple interest and compound interest of a certain sum of money at 20% per annum for 2 years is Rs. 56. Then the sum is :
Options- A. Rs. 3680
- B. Rs. 2650
- C. Rs. 1400
- D. Rs. 1170
- Correct Answer
- Rs. 1400
ExplanationWe know thatThe Difference between Compound Interest and Simple Interest for n years at R rate of interest is given by
Here n = 2 years, R = 20%, C.I - S.I = 56
- 1. On a sum of money, the simple interest for 2 years is Rs. 660,while the compound interest is Rs.696.30,the rate of interest being the same in both the cases. The rate of interest is
Options- A. 10%
- B. 11%
- C. 12%
- D. 13% Discuss
- 2. There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Rs. 12,000 after 3 years at the same rate
Options- A. Rs.4972
- B. Rs.3972
- C. Rs.5972
- D. Rs.2972 Discuss
- 3. In what time will Rs.1000 become Rs.1331 at 10% per annum compounded annually?
Options- A. 2years
- B. 3years
- C. 4years
- D. 5years Discuss
- 8. Find compound interest on Rs. 7500 at 4% per annum for 2 years, compounded annually
Options- A. Rs.512
- B. Rs.515
- C. Rs.612
- D. Rs.522 Discuss
- 9. Divide Rs. 1301 between A and B, so that the amount of A after 7 years is equal to the amount of B after 9 years, the interest being compounded at 4% per annum.
Options- A. Rs.625
- B. Rs.626
- C. Rs.286
- D. Rs.627 Discuss
- 10. A certain sum is to be divided between A and B so that after 5 years the amount received by A is equal to the amount received by B after 7 years. The rate of interest is 10%, interest compounded annually. Find the ratio of amounts invested by them.
Options- A. 121:100
- B. 125:100
- C. 100:121
- D. 100:125 Discuss
Compound Interest problems
Search Results
Correct Answer: 11%
Explanation:
Difference in C.I and S.I for 2 years
= Rs(696.30-660)
=Rs. 36.30.
S.I for one years = Rs330.
S.I on Rs.330 for 1 year =Rs. 36.30
Rate
= (100x36.30/330x1)%
= 11%
Correct Answer: Rs.3972
Explanation:
Let P = Rs. 100. Then, S.I. Rs. 60 and T = 6 years.
R= =10% p.a
Now, P = Rs. 12000. T = 3 years and R = 10% p.a.
C.I=
=Rs.3972
Correct Answer: 3years
Explanation:
The population grew from 3600 to 4800 in 3 years. That is a growth of 1200 on 3600 during three year span.
Therefore, the rate of growth for three years has been constant.
The rate of growth during the next three years will also be the same.
Therefore, the population will grow from 4800 by = 1600
Hence, the population three years from now will be 4800 + 1600 = 6400
Correct Answer: Rs.612
Explanation:
Amount
= Rs[7500x(1+4/100)²]
=Rs.(7500 * 26/25 * 26/25)
=Rs.8112
C.I
= Rs(8112 - 7500)
=Rs.612
Correct Answer: Rs.625
Explanation:
Let the two parts be Rs. x and Rs. (1301 - x).
=> 625x=676(1301-x)
1301x=676 x 1301x=676.
So,the parts are rs.676 and rs.(1301-676)i.e rs.676 and rs.625
Correct Answer: 121:100
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