Question:On a certain sum, the simple interest at the end of 614 years becomes 38 of the sum.What is the rate percent ?
A 7% B 6% C 5% D 512%
+ AnswerB
+ ExplanationLet the sum be x. Then, S.I=3x8 :. Rate=(100×3x8x×254) =300x8×425x=6%
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