Question

A milk vender professes to sell milk at the cost price but uses a false measure of 950 ml instead of a litre. find his profit percent.

Answer 1

price of 1000ml=X
price of 950ml=950x/1000=0.95X
SP of 950ml=X
profit =X-0.95X=0.05X
$profit \: percent = \frac{profit \times 100}{cp} \\ = \frac{0.05x}{0.95x} \times 100 =5.263\%$
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