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Multiple choice

An article was sold for Rs. 144. If the percentage of profit was numerically equal to the cost price, the cost of the article was ____.

  1. Rs. 72

  2. Rs. 80

  3. Rs. 90

  4. Rs. 100

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

SP = CP + (Profit% * CP) / 100. 144 = x + (x * x) / 100. 14400 = 100x + x^2. x^2 + 100x - 14400 = 0. (x+180)(x-80) = 0. x = 80.

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