A sum of money at a certain rate per annum of simple interest doubles – McqOptions

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1.	A sum of money at a certain rate per annum of simple interest doubles in the 5 years and at a different rate become three times in 12 years. The lower rate of interest per annum is:
A.	15%
B.	20%
C.	15 3 % 4
D.	16 2 % 3
Answer» E.

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