Question

a dishonest seller professes to sell his goods at cast price, but he used a weight of 980 grams for 1 kg. find his gain per cont.

Answer 1

let 1000g CP=Rs 1000

cp of 1 g =1 rupee

cp of 980 g = 980

sp of 980 g = 1000

gain = 1000-980
=20 rupees

gain%=20÷980×100

2.04% approx

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Answer 2

gain%=20÷980×100approx=2.04