Question
If the true discount on s sum due 2 years hence at 14% per annum be Rs. 168, the sum due is:
Answer: Option A
$$\eqalign{
& P.W. = \frac{{100 \times T.D.}}{{R \times T}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{100 \times 168}}{{14 \times 2}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 600 \cr
& \therefore {\text{Sum}} = \left( {P.W. + T.D.} \right) \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = Rs.\left( {600 + 168} \right) \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = Rs.\,768 \cr} $$
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$$\eqalign{
& P.W. = \frac{{100 \times T.D.}}{{R \times T}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{100 \times 168}}{{14 \times 2}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 600 \cr
& \therefore {\text{Sum}} = \left( {P.W. + T.D.} \right) \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = Rs.\left( {600 + 168} \right) \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = Rs.\,768 \cr} $$
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