Question
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
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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.
Therefore T.D. on Rs. 260 = Rs. \(\left(\frac{10}{250}\times260\right) = Rs. 10.40\)
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