Question

a shopkeeper buys 5 kg orange for Rs 800 and 5kg of apples for Rs 600.2kg orages were rotten. they sold the remaining oranges at Rs140 per kg. At what price should he sell the apples so that no profit or loss is made?
plz plz answer

Answer 1

$5kg \: orange \: =rs 800 \\ 1kg \: orange \: = \frac{rs800}{5} \\ = rs160 \\3kg \: left \: oranges \: were\: sold \: at \\rs \: 140 \times 3 \: = 420 \\ loss \: = 800 - 420\\ 5kg \: apple \: = rs600 \\ 1kg \: apple \: = \frac{rs600}{5} \\ i.e \: = rs120 \\ \\ left \: oranges \: are \: left \: 3kg \\ \: which \: were \: sold \: at \: 140per \: kg \\ then \: sp \: of \: 3kg \: apple \: at \: rs140 = \\ 420 \: \\ loss \: from \: orange \: 800 - 420 \: \\ = 380 \:$