A 9 kg bag of mangoes for $12 is. Given is the bulk unit rate of the mangoes. Let’s solve for the unit rate of each mango and its price. => Let’s analyze the given situation. It is said that in 9 kilograms of bag of mangoes, the costs of all of it is 12 dollars. Find how much the cost of 1 kg bag of mangoes is. => 12 dollars divided by 9 kilograms to get the value of 1kg bag of mangoes => 12 / 9 = 1.3 Thus, the unit rate is 1.3 dollars / kg