The difference b/w the compound interest payble half yearly and the simple interest on a certain sum lent out at 10% p.a for 1 year is Rs 25. What is the sum? Choose the correct option.
A) Rs. 15000 B) Rs. 12000 C) Rs. 10000 D) Rs. 20000 E) none of these
in simple words S.I= PTR/100=(P*1*10)/100 P/10   HERE AMOUNT A= p+ S.I= P+ P/10=11P/10....   NOW FOR COMPOUND INTEREST WHEN CALCULATED HALF YEARLY AMOUNT=P[1+R/200]^2T=P[1+10/200]^2*1=441P/400   here its given in the question dat diff btwn simple interest and compound interest half yearly ... is 25   =&gt; 441p/400-11p/10= 25 =&gt;p/400=25 =&gt;p= 400*25= 
<gadget id="calculator">400*25</gadget>
<output>10_000</output>
10000 so sum= 10000   ANSWER:Rs. 10000
<result>C</result>
The difference b/w the compound interest payble half yearly and the simple interest on a certain sum lent out at 10% p.a for 1 year is Rs 25. What is the sum?