BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

1 . By selling an article for Tk.144, a man gained such that the percentage gain equals the cost price. The CP of the article is--

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Answer: Option B

Explanation:

let x be the cost price. so the profit percent is x too

Selling price = x + (x*x)/100
144 = x+ x*x/100

x2+100x-14400 =0
x =-180 or x= 80

So CP =80.