A body of volume 100 c.c. is immersed completely in waer contained in a jar. The weight of water and the jar before immersion of the body was 700g wt. after immersion weight of water and jar will be

Options

A. 700 g wt
B. 800 g wt.
C. 500 g wt
D. 100 g wt

Answer

To solve the problem, we need to determine the weight of the water and jar after a body of volume 100 cm³ is completely immersed in the water.

### Step-by-Step Solution:

1. **Identify the Initial Conditions**:
- The initial weight of the water and the jar is given as 700 g wt.

2. **Understand the Volume of the Immersed Body**:
- The volume of the body that is immersed in the water is 100 cm³.

3. **Calculate the Weight of Water Displaced**:
- Since the body is completely immersed, it displaces an amount of water equal to its own volume.
- The density of water is approximately 1 g/cm³.
- Therefore, the weight of the water displaced by the body can be calculated as:
\[ \text{Weight of water displaced} = \text{Volume} \times \text{Density} = 100 \, \text{cm}^3 \times 1 \, \text{g/cm}^3 = 100 \, \text{g} \]

4. **Determine the New Weight After Immersion**:
- When the body is immersed, it adds the weight of the displaced water to the system.
- The new weight of the water and jar after immersion can be calculated as:
\[ \text{New weight} = \text{Initial weight} + \text{Weight of water displaced} = 700 \, \text{g} + 100 \, \text{g} = 800 \, \text{g} \]

5. **Conclusion**:
- Therefore, the weight of the water and the jar after the immersion of the body will be 800 g wt.

### Final Answer:
The weight of the water and jar after immersion will be **800 g wt**.