Simple interest on a certain amount is 916 of the principal. If the numbers representing the rate of interest (in percent) and time (in years) be equal, then time, for which the principal is lent out, is
A
512years
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B
612years
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C
7 years
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D
712years
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Solution
The correct option is D712years SI=/Prt100=916/P If r = t ⇒r2100=916⇒r=√100×916=304=7.5% Since r = t t = 7.5 years