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7.Profit and Loss
hard
Sonal buys mangoes at the rate of $3 \,kgs$ for $Rs$. $21$ and sells them at $5$ $kgs$ for $Rs.$ $50 .$ To earn a profit of $Rs.\,102,$ he must sell how many mangoes in $kgs$?
A
$34$
B
$52$
C
$26$
D
$32$
Solution
$CP$ of each kg mango $=$ $Rs.$ $\frac{21}{3}=$ $Rs. 7$
$SP$ of each $kg$ mango $= Rs . \frac{50}{5}= Rs .10$
Profit $= SP – CP = Rs .3$
Here, Rs. 3 is profit earned for $1\, kg$
Similarly, $Rs.\, 102$ is profit earned for:
$=\frac{1}{3} \times 102=34 kg$
Standard 13
Quantitative Aptitude