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Question
A woman sold her earphone for Rs. 2,000 and got a percentage profit equal to the numerical value of cost price. The cost price of the earphone is:
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Answer
HI Parikhit Mahanta,
In the question, it is given that profit percentage is same as cost price
S.P - C.P/C.P * 100 = profit%
2000-x/x * 100 = x
x^2 + 100x - 200000 = 0
(x+500)(x-400) = 0
x = 400
Therefore, cost price = Rs 400
Hope this helps!
