Discussion :: True Discount

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?
Answer : Option B
Explanation :
S.I. on Rs. (260  20) for a given time = Rs. 20.
S.I. on Rs. 240 for half the time = Rs. 10.
T.D. on Rs. 250 = Rs. 10.
T.D. on Rs. 260 = Rs.\([\frac { 10} { 2 50} *260]\)= Rs. 10.40
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