Question

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(22) A man purchase some article @ Il article for Rs 10 and
sells all the articles @ 10 article for Rs 11 - find P/ or Ll.​

Answer 1

Answer:

Suppose the man bought 110 articles

CP of 11 articles=10

$\sf \: c p \: of \: 110 \: articles = \frac{10}{11} \times 110 = 100$

SP of 10 articles =11

$\sf \: sp \: of \: 110 \: articles = \frac{11}{10} \times 110 = 121$

Gain=SP-CP=21

$\sf \: Gain \: percent = \frac{gain}{cp} \times 100 \\ \bf \: \frac{21}{100} \times 100 = \underline{ \boxed{ \bf \: 21 \: percent}}$