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 choice from the following
A) Rs. 10
B) Rs. 10.40
C) Rs. 15.20
D) Rs. 13
E) None of these
Solution   S.I. on Rs. (260-20) for a given time =Rs. 7.34.   S.I. on Rs. 240 for half the time = Rs.10.   T.D. on Rs. 250 = Rs. 10.   ∴ T.D. on Rs. 260 = Rs. ( 10/250 x260 ) = Rs. 10.40.   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 ?