1.

With a. given rate of simple inerest, the ratio of principal and amount for a certain period of time is 4 : 5. After 3 years, with the same rate of inter-est, the ratio of the principal and amount be-comes 5 : 7. The rate of interest is

A. 45
B. 65
C. 5%
D. 7%
Answer» D. 7%


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