Question

by selling 32 orange for a rupee a man loss40%.hom many for arupee did he sell to earn 20%

Answer 1

$cost \: of \: 32 \: oranges \: = 1 \\ cost \: of \: 1 \: orange \: = \frac{1}{32} \\ loss \: percent \: = 40\% \\ cp \: of \: 1 \: orange \: = \frac{100}{(100 - 40)} \times \frac{1}{32} \\ = \frac{1}{32} \times \frac{100}{60} \\ if \: 20\% \: profit \: required \: then \: sp \: of \: 1 \: orange \: \\ = \frac{1}{32} \times \frac{100}{60} \times \frac{120}{100} \\ = \frac{1}{16} \\ therefore \: 16 \: oranges \: should \: be \: sold \: for \: a \: rupee.$