A shopkeeper gains cost of 8 metres thread by selling 40 metres thread. Find his gain percent.

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7.Profit and Loss

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A shopkeeper gains the cost of $8$ metres thread by selling $40$ metres thread. Find his gain percent.

A

$19$

B

$20$

C

$22$

D

None of these

Solution

Here, $m=48, n=40$

$\therefore$ Gain $\%=\left(\frac{m-n}{n}\right) \times 100=\left(\frac{48-40}{40}\right) \times 100$

$=\frac{8}{40} \times 100=20 \%$

Standard 13

Quantitative Aptitude

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