A rucksack containing three bottles weighs 1.8 kg.

Question

Each water bottle weighs the same and the empty rucksack weighs 300 g.

How much does one water bottle weigh?

Answer 1

Let's assume the weight of each water bottle is x kg.

The weight of the rucksack without the bottles is 300 g, which is equal to 0.3 kg.

Therefore, the weight of the three water bottles is 1.8 kg - 0.3 kg = 1.5 kg.

Since each water bottle weighs the same, we can divide the total weight by the number of bottles to find the weight of one water bottle.

1.5 kg / 3 = 0.5 kg.

So, one water bottle weighs 0.5 kg.