Rs. 20 is the true discount on Rs. 260 due after a certain time. What will be the true discount on the same sum due after half of the former time, the rate of interest being the same?
Choose the correct option:
A) Rs. 10	B) Rs. 10.40	C) Rs. 15.20	D) Rs. 13	E) Rs. 14
given TD=20, S=260 from these we can know PW=S-TD=260-20= 
<gadget id="calculator">260-20</gadget>
<output>240</output>
240   given TD for sum is 20   SI on PW is TD=&gt;SI on 240 is 20   now given TD is half of the former time   =&gt; SI on 240 is 10   =&gt; TD on 250(i.e 240+10) is 10 (since given TD on sum=PW+TD is half the former time)   =&gt; TD on 260=(10/250)*260= 
<gadget id="calculator">(10/250)*260</gadget>
<output>52/5 = around 10.4</output>
Rs10.40   ANSWER:Rs. 10.40
<result>B</result>
Rs. 20 is the true discount on Rs. 260 due after a certain time. What will be the true discount on the same sum due after half of the former time, the rate of interest being the same?