percent.2.A sum of money doubles itself in 10 years at simple interest – InterviewSolution

1.	percent.2.A sum of money doubles itself in 10 years at simple interest. What is therate of interest?
Answer» Let the principal be xTime = 10 yearsAmount after 10 years gets doubled So amount = 2x simple interest = amount - principalsimple interest = 2x - x = xRate per annum = SI × 100 / P × T= x × 100 / x × 10100x/ 10x = 10So rate per annum = 10%.

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