At simple interest, a sum becomes 3 times in 20 yr. Find the time, in which the sum will be double at the same rate of interest.

At simple interest, a sum becomes 3 times in 20 yr. Find the time, in

1.	At simple interest, a sum becomes 3 times in 20 yr. Find the time, in which the sum will be double at the same rate of interest.
A.	8 yr
B.	10 yr
C.	12 yr
D.	14 yr
Answer» C. 12 yr

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At simple interest, a sum becomes 3 times in 20 yr. Find the time, in which the sum will be double at the same rate of interest.

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