A certain sum of money at simple interest amounted Rs.840 in 10 years at 3% per annum, find the sum?	Choose the correct choice from the following answers
A) 971	B) 973	C) 268	D) 646	E) 365
840 = P [1 + (10*3)/100]   P = 646   Answer: 646
<result>D</result>
A certain sum of money at simple interest amounted Rs.840 in 10 years at 3% per annum, find the sum?