Thomas takes loan from a bank at 20% p.a. simple interest.
After how many years will the sum of money become three times the principal?  Answers:
A) 2 years 1 month
B) 4 years
C) 10 years
D) 8 years 3 months 2 days
E) 5 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 20   3= [1+(20t/100)]   t= 10 which is 10 years.   Answer is 10 years
<result>C</result>
Thomas takes loan from a bank at 20% p.a. simple interest.
After how many years will the sum of money become three times the principal?