A sum of Rs.100 is lent at simple interest of 3% p.a. for the first month, 9% p.a. for the second month, 27% p.a. for the third month and so on. What is the total amount of interest earned at the end of the year approximately Choose the most appropriate option
A) Rs.797160
B) Rs.791160
C) Rs.65930
D) Rs.66430
E) Rs.67430
Total amount of Interest is   I = P/100 * 1[3/12 + 9/12 +27/12…. 312/12   Where P = 100; I = 1/12 (3+9+…..312)   I = 1/12(3(312-1))/3-1   = 531440* 3/12*2 =Rs.66430   ANSWER:Rs.66430
<result>D</result>
A sum of Rs.100 is lent at simple interest of 3% p.a. for the first month, 9% p.a. for the second month, 27% p.a. for the third month and so on. What is the total amount of interest earned at the end of the year approximately