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प्रश्न
By selling an article for Rs. 810, a loss of 10 percent is suffered. Find its cost price.
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उत्तर
S.P. of an article = Rs. 810
Loss = 10 %
∴ C.P. = `("S.P." xx 100)/(100 - "Loss"%)`
`= (810 xx 100)/(100 - 10)`
`= (810 xx 100)/90`
Rs. 900
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