An amount becomes 3 times in 4 years when kept in a scheme of simple interest. In how many years will it become 21 times?

An amount becomes 3 times in 4 years when kept in a scheme of simple i

1.	An amount becomes 3 times in 4 years when kept in a scheme of simple interest. In how many years will it become 21 times?
A.	20
B.	36
C.	40
D.	30
Answer» D. 30

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An amount becomes 3 times in 4 years when kept in a scheme of simple interest. In how many years will it become 21 times?

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