A certain sum of money amounts to Rs. 1008 in 2 years and to Rs.1164 in 3 ½ years. Find the sum and rate of interests. Choose the correct choice from the following:  A) 13%  B) 12%  C) 25%  D) 18%  E) 52%
S.I. for 1 ½ years = Rs.(1164-1008) = Rs.156.   S.l. for 2 years = Rs.(156*(2/3)*2)=Rs.208   Principal = Rs. (1008 - 208) = Rs. 800.   Now, P = 800, T = 2 and S.l. = 208.   Rate =(100* 208)/(800*2)= 
<gadget id="calculator">(100* 208)/(800*2)</gadget>
<output>13</output>
13%   13%nswer is 13%.
<result>A</result>
A certain sum of money amounts to Rs. 1008 in 2 years and to Rs.1164 in 3 ½ years. Find the sum and rate of interests.