Robert borrows a certain amount at 15% p.a. simple interest. How many years will it take for the amount to become twice the principal?
Select:
A) 4 years 4 months B) 5 years 2 months 3 days C) 6 years 5 months D) 3 years E) 8 years
Solution: simple interest question   B=A[1+ (tr/100)]; where A is principal amount, B final amount, t time in years and r interest rate   after putting the values 15   2= [1+(15t/100)]   t= 4/3 which is (4+1)/3= 4 + 1/3 means 4 years and   (12*1)/3= 
<gadget id="calculator">  (12*1)/3</gadget>
<output>4</output>
4 months.   Total time is 4 years 4 months   4 years 4 monthsnswer is 4 years 4 months
<result>A</result>
Robert borrows a certain amount at 15% p.a. simple interest. How many years will it take for the amount to become twice the principal?