A sum of money earning compound interest annually doubles itself after 4 years. What is the rate of interest ?

A sum of money earning compound interest annually doubles itself after

1.	A sum of money earning compound interest annually doubles itself after 4 years. What is the rate of interest ?
A.	14%
B.	19%
C.	18%
D.	15%
Answer» C. 18%

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A sum of money earning compound interest annually doubles itself after 4 years. What is the rate of interest ?

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