A dishonest shopkeeper pretends to sell his goods at cost price but uses false weights and gains 25%. For a weight of 1 kg he uses:
Let the error be x gms. Then, => x/(1000-x) × 100 = 25 => x/(1000-x) = 25/100 => 4x = 1000 - x => 5x = 1000 => x = 200 Weight used = (1000 – 200) = 800gms
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