Question

A shopkeeper sells rice at the cost price, but uses false weight. He gains 20% in this process. What weight does he use for one kilogram?

Accepted Answer

C. Let $x$ be the false weight used for 1000 g. $$	ext{Gain\%} = \frac{1000 - x}{x} 	imes 100$$ $$20 = \frac{1000 - x}{x} 	imes 100 \implies 0.20 x = 1000 - x \implies 1.2 x = 1000$$ $$x = 833.33	ext{ g} = 833\frac{1}{3}	ext{ g.}$$

Dishonest trader false weight

Explanation

Practise this under exam conditions