Question

At 11 percent interest, how long would it take to quadruple your money? 13.09 years 6.64...

At 11 percent interest, how long would it take to quadruple your money?

  1. 13.09 years

  2. 6.64 years

  3. 13.28 years

  4. 13.56 years

  5. $7.94

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Answer #1

Solution:

Suppose you have $100 to invest it today at the rate of 11% per annum compounded quarterly. Then:

4 Amount Outstanding Interest Earned Amount Outstanding Year Interest ® 11% at the beginning During the Year at the end 1 100

  • Amount short at the end of 13th year = 400-388.3280163

= 11.67198374

  • Part of 14th year required to earn this year = 11.67198374/Interest Earned in 14th year

= 11.67198374/42.71608179

= 0.27325

Total duration required to quadruple the money under current situation = 13 years + 0.27325 year i.e., 13.27325 year.

Our answer is closest to option C. Hence, C is the correct choice.

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