A. 16

B. 8

**C. 12**

D. 20

Explanation:

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100 —- 200 —- 4

400 —- 4

800 —- 4

——

**12 years**

### Related Mcqs:

- A sum of money placed at C.I. interest doubles itself in 5 years. It will amount to eight times itself at the same rate of interest in?
A. 7 years

B. 10 years

**C. 15 years**

D. 20 years - A sum of money placed at compound interest doubles itself in 5 years in how many years it would to 8 times of itself at the same rate of interest?
A. 7 years

B. 10 years

**C. 15 years**

D. 20 years - The sum of money at compound interest amounts to thrice itself in 3 years. In how many years will it be 9 times itself?
A. 18

B. 12

C. 9

**D. 6** - 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 - Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 4000 for 2 years at 10% per annum. The sum placed on simple interest is:_______?
A. Rs. 1550

B. Rs. 1650

**C. Rs. 1750**

D. Rs. 2000 - A money lender borrows money at 4% P.a and pays interest at the end of the year. He lends it at 6% P.a compound interest compounded half-yearly and receives the interest at the end of the year. Thus be gains Rs 104.50 a year. The amount of money he borrows is_________?
A. Rs 4500

**B. Rs 5000**

C. Rs 5500

D. Rs 6000 - A sum amount to Rs.1344 in two years at simple interest. What will be the compound interest on the same sum at the same rate of interest for the same period?
A. Rs.150

B. Rs.140

C. Rs.130

**D. Data insufficient for the answer** - A sum of Rs.4800 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years.
A. Rs.2520

**B. Rs.3120**

C. Rs.3320

D. Rs.2760

E. None of these - A sum of money is put out at compound interest for 2 years at 20%. It would fetch Rs.482 more if the interest were payable half-yearly, then it were pay able yearly. Find the sum.
A. Rs.4000

B. Rs.1000

C. Rs.1250

**D. Rs.2000** - The simple interest on Rs.12000 at a certain rate of interest in five years is Rs.7200. Find the compound interest on the same amount for five years at the same rate of interest.
A. Rs.3502.80

B. Rs.3052.40

C. Rs.3054.8

**D. Rs.3052.80**

E. None of these

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