An article is bought for Rs.5,700 and Rs.1,300 is spent on its repairing, transportation, etc. For how much should this article be sold in order to gain 20% on the whole.
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Solution
Let x be the selling price of article.
Total money spent on the article =5700+1300=7000
According to the question-
x=7000+20100×7000
⇒x=7000+1400=Rs.8400
Hence the article should be sold at Rs.8400 to gain 20%.