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The image you uploaded is visible, and I can help solve the problem. Let's go step by step.

The problem involves two cylinders filled with water:
- The smaller cylinder has a diameter of 0.25 m and a height of 1.2 m.
- The larger cylinder has a diameter of 0.9 m and a height of 0.8 m.

### Let's solve the two questions:

1. **Total pressure at the bottom of the larger cylinder (0.9 m diameter):**
   - Pressure at the bottom due to water is given by the formula: 
     \[
     P = \rho \cdot g \cdot h
     \]
     where:
     - \( \rho \) is the density of water (1000 kg/m³),
     - \( g \) is the acceleration due to gravity (9.81 m/s²),
     - \( h \) is the total height of the water column (sum of the heights of both cylinders).

2. **Weight of the total volume of water:**
   - First, calculate the volume of water in each cylinder using:
     \[
     V = \pi \cdot r^2 \cdot h
     \]
   - Then, use the formula for weight:
     \[
     W = \rho \cdot V \cdot g
     \]

I'll calculate these values for you now.Here are the results for the given problem:

1. **Total pressure at the bottom of the larger cylinder**:  
   The pressure at the bottom is approximately **19,620 Pascals (Pa)**.

2. **Weight of the total volume of water**:  
   The total weight of the water is approximately **5,570.54 Newtons (N)**.

Additionally, the total volume of water in both cylinders is **0.568 m³**.

Would you like more detailed steps or explanations? Here are five questions related to this:

1. How would the results change if the height of the larger cylinder increased?
2. Can we calculate the force exerted by the water on the walls of the larger cylinder?
3. How does the pressure distribution vary along the height of the cylinders?
4. What effect would adding another cylinder on top have on the total pressure?
5. How do the dimensions of the cylinder influence the total water weight?

**Tip:** For similar problems, always ensure units are consistent throughout calculations to avoid errors.

A cylinder of 0.25 m diameter and 1.2 m height is fixed centrally on the top of a large cylinder of 0.9 m diameter and 0.8 m height. Both the cylinders are filled with water. Calculate 1. Total pressure at the bottom of the bigger cylinder, and 2. Weight of the total volume of water.

Learn how to calculate the total pressure at the bottom of a large cylinder and the weight of the total volume of water in two combined cylinders filled with water. This problem involves key concepts in fluid mechanics and uses formulas for pressure, volume, and weight calculation. Suitable for students in Grades 11-12.

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