A sum becomes two times in 7 years at compound interest. In how many years the same sum will become 16 times?

A sum becomes two times in 7 years at compound interest. In how many y

1.	A sum becomes two times in 7 years at compound interest. In how many years the same sum will become 16 times?
A.	21
B.	28
C.	35
D.	19
Answer» C. 35

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A sum becomes two times in 7 years at compound interest. In how many years the same sum will become 16 times?

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