If the simple interest on a sum of a money for 2 years at 5% per annum is $50 what is the compound interest on the sum of the same rate and same time  Select
A) $57.96
B) $78.89
C) $88.45
D) $51.25
E) $78.24
sum= 50*100/10= 
<gadget id="calculator">50*100/10</gadget>
<output>500</output>
500   amount=$(500(1+10/100)^2)   =500*21/20*21/20= 
<gadget id="calculator">500*21/20*21/20</gadget>
<output>2_205/4 = around 551.25</output>
$551.25   C.I=$(551.25-50)=$51.25   Answer ($51.25)
<result>D</result>
If the simple interest on a sum of a money for 2 years at 5% per annum is $50 what is the compound interest on the sum of the same rate and same time