A sum is invested at a simple interest. If the rate of interest is 20% per annum, then in how much time will it become double of itself?

A sum is invested at a simple interest. If the rate of interest is 20%

1.	A sum is invested at a simple interest. If the rate of interest is 20% per annum, then in how much time will it become double of itself?
A.	5 years
B.	10 years
C.	4 years
D.	8 years
Answer» B. 10 years

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A sum is invested at a simple interest. If the rate of interest is 20% per annum, then in how much time will it become double of itself?

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