A trader adds $40 %$ of the price he pays for his goods to give the selling price. He later reduces the price of the goods, in a sale, by $25 %$ . If the trader buys an article for Rs. $640$ ; find its sale price.

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Solution

Lets price of goods be Rs. $100$
After adding $40 %$ price S.P $= 100 + 40 =$ Rs. $140$
In sell $25 %$ of selling S.P $= \frac{140 \times 25}{100} =$ Rs. $35$
Hence after discount S.P $= 140 - 25 =$ Rs. $105$
Total gain $= 105 - 100 = 5 %$
If cost Rs. $640$
then Selling price $= 640 + \frac{640 \times 5}{100} =$ Rs. $672$

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A trader adds 40% of the price he pays for his goods to give the selling price. He later reduces the price of the goods, in a sale, by 25%. If the trader buys an article for Rs. 640; find its sale price.

Lets price of goods be Rs. 100After adding 40% price S.P =100+40= Rs. 140In sell 25% of selling S.P =140×25100= Rs. 35Hence after discount S.P =140−25= Rs. 105Total gain =105−100=5%If cost Rs. 640then Selling price =640+640×5100= Rs. 672

A trader adds $40 %$ of the price he pays for his goods to give the selling price. He later reduces the price of the goods, in a sale, by $25 %$ . If the trader buys an article for Rs. $640$ ; find its sale price.