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A sum of money placed at compound intere...

A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to four times itself?

A

8 years

B

12 years

C

16 years

D

20 years

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UNITED BOOK HOUSE-Compound Interest and Uniform rate of Increase or Decrease -Exercise
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  3. There is 60% increase in an amount in 6 years at simple interest. What...

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  4. A bank offers 5% compound interest calculated on half-yearly basis a c...

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  5. Find the compound interest on ₨ 16,000 at 20% per annum for 9 months, ...

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  6. The difference between compound interest and simple interest on an amo...

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  7. The differences between simple and compound interests compounded annua...

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  8. Albert invested an amount of ₨ 8000 in a fixed deposit scheme for 2 ye...

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  9. The effective annual rate of interest corresponding to a nominal rate ...

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  10. Andrews earns an interest of ₨ 1596 for third year and ₨ 1400 for the ...

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  11. A sum amounts to ₨ 882 in 2 years at 5% compound interest. The sum is

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  12. On a certain sum of money, the simple interest for 2 years is ₨ 200 at...

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  13. If the simple interest on a sum at 4% per annum for 2 years is Rs. 80,...

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  14. At what rate per annum will ₨ 32000 yield a compound interest of ₨ 504...

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  15. In what time will ₨ 10,000 amount to ₨ 13310 at 20% per annum compound...

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  16. A sum of money placed at compound interest doubles itself in 4 years. ...

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  17. Ram invests ₨ 5000 in a bond which gives interest at 4% per annum duri...

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  18. Value of a machine in a factory is ₨ 180000. The value of the machine ...

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  19. At present the sum of the number of students in all the secondary inst...

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