An amount doubles the rate of simple interest in 10 years. In how many years will it become 4 times the same rate of simple interest?

An amount doubles the rate of simple interest in 10 years. In how many

1.	An amount doubles the rate of simple interest in 10 years. In how many years will it become 4 times the same rate of simple interest?
A.	20 years
B.	25 years
C.	30 years
D.	50 years
Answer» D. 50 years

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An amount doubles the rate of simple interest in 10 years. In how many years will it become 4 times the same rate of simple interest?

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