Profit and Loss Practice Test 9

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Question : 27 of 40

Marks: +1, -0

Find the cost price of an article if its selling price is Rs 144 and the CP is numerically equal to the profit percentage.

Rs 88
Rs 85
Rs 89
Rs 80
Cannot be determined

Solution:

{144-x}/x  ×100=x

14,400 - 100x = x^2

x^2 + 100x - 14,400 = 0

x^2 + 180x - 80x - 14,400 = 0

x (x +180) - 80 (x + 180) = 0

(x -180) (x + 180) = 0

⇒ x = 80

So, CP = Rs 80

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