A sum is tripled in 4 years when invested at compound interest. In what time will the same sum become 9 times?

A sum is tripled in 4 years when invested at compound interest. In wha

1.	A sum is tripled in 4 years when invested at compound interest. In what time will the same sum become 9 times?
A.	10
B.	9
C.	7
D.	8
Answer» E.

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A sum is tripled in 4 years when invested at compound interest. In what time will the same sum become 9 times?

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