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21 September, 23:51

The price of an article is marked so as to gain 20%but when a 5% discount allowed in marked price there is profit of rs 4200. find the cost price of the article

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  1. 21 September, 23:53
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    30000

    Explanation:

    here

    gain = 20%

    also mp is set in such a way that we will gain 20% profit so, by the question

    mp=cp+20%of cp

    =x (let) + 20%of x

    = 120/100x

    also, if 5% discount is allowed on mp then rs4200 will be profit., then we have

    sp=120/100 x - 5%of 120/100 x

    =120/100 x - 600/10000 x

    =12000-600/10000 x

    =11400/10000 x

    =114/100 x

    again,

    profit = sp - cp

    4200=114/100 x - x

    4200 = 14x/100 (after taking l. c. m)

    x=420000/14 (after cross multiply)

    x=rs 30,000
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