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7.Profit and Loss
medium
A man sold a cow at a loss of $12 \%$. If he had been able to sell it at a gain of $6 \%,$ it would have etched $Rs\,72$ more than it did. What was the cost price?
A
$300$
B
$500$
C
$400$
D
$600$
Solution
$(106)$$\%$ of cost price $-(100-12) \%$ of cost price $=₹ 72$
$\therefore$ cost price $=$$\frac{{72}}{{\frac{{106 – 88}}{{100}}}}$$\times \frac{72 \times 100}{18}=₹ 400$
Standard 13
Quantitative Aptitude