Question
A man sells an article at a certain price and suffers a
loss of 20%. If he sells the article at ₹100 more, he gets a profit of 30%. Find the cost price of the article (in ₹).Solution
Let cost price = x Selling at 20% loss ⇒ SP = 0.8x Selling at ₹100 more gives 30% profit ⇒ SP = 1.3x So: 1.3x−0.8x=100⇒0.5x=100⇒x=100÷0.5= ₹200
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