A certain sum of money at simple interest amounted Rs.645 in 12 years at 5% per annum, find the sum?  Select.
A) 403  B) 410  C) 500  D) 340  E) 455
645 = P [1 + (12*5)/100]   P = 403   403nswer: 403
<result>A</result>
A certain sum of money at simple interest amounted Rs.645 in 12 years at 5% per annum, find the sum?