find the cost price of an article if its selling price is Rs 1820 with a profit 30%

Let the CP of the article = Rs xNow, SP of the article = Rs 1820Profit % = 30%ProfitCP×100% = 30%ProfitCP×100 = 30ProfitCP × 10 = 310 profit = 3CP10SP - CP = 3CP10SP - 10CP = 3CP13CP = 10SP13x = 10 ×1820x = 1400So, CP of the article = Rs 1400

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cp=? sp=1820 p=30percent
​cp    sp
100  130
       1820 [cross multiplication]
 
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Sp=rs.1820 profit = 30%
cp= 100/100+profit%*sp
=100/130*1820
=1400
Hence,cp of the article = Rs.1400 Answer.

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