Question

rita sells a cupboard for rupees 2640 and loses 12% what should be the sp for a gain of 12%

Answer 1

$selling \: prise = 2640 \\ loss = 12\% \\ cost \: prise = \binom{100}{100 - loss\%} \times sp \\ cp = \frac{100}{100 - 12} \times 2640 \\ cp = \frac{100}{88} \times 2640 \\ cp = 3000 \\ if \: gain = 12\% \\ selling \: prise = \frac{100 + gain}{100} \times cp \\ = \frac{112}{100} \times 3000 \\ selling \: prise = 3360$