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7.Profit and Loss
easy
A trader buys $500\, kg$ of cotton for $Rs.\, 9,000.10 \%$ of this cotton is spoiled due to rain. At what rate ($Rs./ kg$) should he sell the rest to earn $10 \%$ profit?
A
$25$
B
$30$
C
$22$
D
$20$
Solution
Remaining cotton $=90 \%(500)=450 kg$
$S.P$ with $10 \%$ profit $=110 \%(9000)=₹ 9900$
$S.P$ of $1 kg$ of $cotton =\frac{9900}{450}=Rs. 22$
Standard 13
Quantitative Aptitude