A sum of money doubles itself in 4 years at simple interest, then find

1.	A sum of money doubles itself in 4 years at simple interest, then find the rate of interest.
A.	20%
B.	25%
C.	12%
D.	18%
Answer» C. 12%

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A sum of money doubles itself in 4 years at simple interest, then find the rate of interest.

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