The difference between the compounded interest and simple interest on a certain sum at 10% per annum for 2 years is Rs.631. Find the sum.	Choose the correct choice from the following options:
A) Rs. 52255	B) Rs. 50000	C) Rs. 63200	D) Rs. 63100	E) None
Let the sum be Rs. X .Then, C.I.. = x( 1 + 10/100 )2 - x = 21x/100 S.I. = [ (x*10*2)/100] = x/5 (C.I.) – (S.I.) = [ (21x)/100 – (x/5) ] = x/100 =&gt; x/100 = 631 =&gt; x= 63100 Hence, the sum is Rs. 63100   Answer Rs. 63100
<result>D</result>
The difference between the compounded interest and simple interest on a certain sum at 10% per annum for 2 years is Rs.631. Find the sum.