A certain sum becomes four times itself at simple interest in eight years. In how many years does it become ten times itself?

A certain sum becomes four times itself at simple interest in eight

1.	A certain sum becomes four times itself at simple interest in eight years. In how many years does it become ten times itself?
A.	21
B.	25
C.	23
D.	None of these
Answer» E.

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A certain sum becomes four times itself at simple interest in eight years. In how many years does it become ten times itself?

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