Question
A dishonest seller, at the time of selling and
purchasing uses weight 22% less and 30% more per kg respectively. Find the approx. percent profit earned by him if he claims that he sells his goods at cost price.Solution
C.P of 1300 gm= Rs 1000 ∴ CP of 780 gm= Rs 600 SP of 780 gm = Rs 1000 ∴ % profit =  400/600 × 100  = 66.66% approx.
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