A certain sum of money at simple interest amounted Rs.640 in 10 years at 3% per annum, find the sum? Choices.
A) 442.3 B) 492.3 C) 592.3 D) 402.3 E) 472.3
640 = P [1 + (10*3)/100]   P = 492.30   ANSWER:492.3
<result>B</result>
A certain sum of money at simple interest amounted Rs.640 in 10 years at 3% per annum, find the sum?