By selling an article, Kishore earned a profit equal to two-fifth of the price he bought it. If he sold it for Rs. 350, what was the cost price?
Solution: S.P. = C.P.+2/5 C.P. = 7/5C.P.
.'. 7/5 C.P. = 350 => C.P. =Rs.(350*5/7) = Rs. 250.
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