Question

While selling a pen for Rs 24, the loss percentage is equal to its cost price is rupees. Find the cost price of the pen.

Answer 1

Solution Let the cost price of pen be Rs. x. Then Gain x% = Rs (x*(x/100)) = Rs.. x^2/100 Now SP = CP + Gain 24 = x+(x^2/100) Put the value and solve ie. x^2+100x-2400=0 ie. (x+120)(x-20) = 0 Ie. x = -120 and 20 price can not be negative ans is 20