If a certain sum becomes 2 times in 5 years at compound interest, then in how many years, it will become 8 times?

If a certain sum becomes 2 times in 5 years at compound interest, then

1.	If a certain sum becomes 2 times in 5 years at compound interest, then in how many years, it will become 8 times?
A.	10
B.	20
C.	15
D.	30
Answer» D. 30

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If a certain sum becomes 2 times in 5 years at compound interest, then in how many years, it will become 8 times?

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