Question

(II) HKCEE

2010Q6
The cost of a bottle of orange juice is the same as the cost of 2 bottles of milk. The total cost of 3 bottles of
orange juice and 5 bottles of milk is $66. Find the cost of a bottle of milk.
(4 marks)

Answer 1

The cost of a bottle of milk is $8.25.

Step-by-step explanation:

Let's assume the cost of a bottle of orange juice is x dollars. According to the information given, the cost of a bottle of orange juice is the same as the cost of 2 bottles of milk, so the cost of a bottle of milk is also x dollars.

The total cost of 3 bottles of orange juice is 3x dollars, and the total cost of 5 bottles of milk is 5x dollars. The sum of these two costs is $66, so we can create the equation:

3x + 5x = 66

Simplifying the equation, we get 8x = 66. Dividing both sides by 8, we find that x = 8.25. Therefore, the cost of a bottle of milk is $8.25.

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