Problem: a dishonest milkman wants to make a profit on the selling of milk . he would like to mix water ( costing nothing ) with milk costing rs . 33 per litre so as to make a profit of 25 % on cost when he sells the resulting milk and water mixture for rs . 36 in what ratio should he mix the water and milk ?
Rationale: "water = w ( liter ) milk = m ( liter ) = = > cost = price x quantity = 0.33 m = = > revenue = price x quantity = 0.36 ( m + w ) = = > profit = 0.36 ( m + w ) - 0.33 m = 0.25 * ( 0.33 m ) [ 25 % of cost ] = = > 0.36 m + 0.36 w - 0.33 m = 0.0825 m = = > 0.0525 m = 0.36 w = = > m / w = 0.36 / 0.0525 = 124 / 21 - - or - - w / m = 21 / 124 e is correct ."
annotated_formula: divide(const_1, divide(25, const_2))