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Question

TWO COWS WERE BOUGHT AT THE SAME COST EACH. ONE WAS SOLD AT A PROFIT OF 5% AND THE OTHER WAS SOLD AT A LOSS OF 7%. IF THE ACTUAL DIFFERENCE OF THE SELLING PRICES WERE RS 144, WHAT IS THE COST PRICE OF EACH COW? ​

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Solution

Let the CP of first cow = Rs xProfit on first cow = 5%ProfitCP×100% = 5%Profitx × 100 = 520profit = x20SP-CP = x20SP-x = x20SP - 20x = x20SP = 21xSP of first cow = Rs 2120xLet the CP of second cow = Rs xloss on first cow =7%lossCP×100% = 7%lossx × 100 = 7100 loss = 7x100CP-SP = 7x100x-SP = 7x100x - 100SP = 7x100SP = 93xSP of second cow = Rs 93100xNow, SP of first cow - SP of second cow = Rs 14421x20 - 93x100 = 144105x-93x100 = 14412x100 = 144x = 1200So, CP of each cow = Rs 1200

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