Weight of the Balloon

To determine the weight of the water inside the rubber balloon, we first need to understand the concept of buoyancy. When an object is submerged in a fluid, it experiences an upward force called buoyant force. This force is equal to the weight of the fluid displaced by the object.

In the case of the rubber balloon filled with water, the balloon displaces an amount of water equal to its own volume. The weight of this displaced water will be equal to the buoyant force acting on the balloon.

Buoyant Force

The buoyant force can be calculated using the formula:

Buoyant force = weight of the fluid displaced

Since the balloon is completely filled with water, the weight of the fluid displaced will be equal to the weight of the water in the balloon.

Calculating the Weight of Water

Given that the rubber balloon contains 200g of water, we can conclude that the weight of the water in the balloon is 200g.

Weight of the Balloon in Water

Now, let's consider the weight of the balloon itself when submerged in water. Since the balloon is made of rubber, it is less dense than water. This means that the buoyant force acting on the balloon will be greater than its weight.

As a result, the balloon will float in water, with only a portion of its weight being supported by the buoyant force. The remaining weight of the balloon will be equal to the weight of the water it displaces.

Final Answer

Since the weight of the balloon is negligible compared to the weight of the water it contains, the weight of the balloon in water will be approximately equal to the weight of the water, which is 200g.

Therefore, the correct answer is A) 200g.