If a certain sum of money become thrice of itself in 5 years 4 months at simple interest, then what will be the yearly rate of interest (in %)?

If a certain sum of money become thrice of itself in 5 years 4 months

1.	If a certain sum of money become thrice of itself in 5 years 4 months at simple interest, then what will be the yearly rate of interest (in %)?
A.	18.75
B.	27.5
C.	37.5
D.	42.25
Answer» D. 42.25