What is the total charge enclosed by a closed surface if the electric flux entering and leaving the surface are 20000 `NC^(-1) m^2` and 30000 `NC^(-1)m^2` respectively.

Explanation

To solve the problem of finding the total charge enclosed by a closed surface given the electric flux entering and leaving the surface, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- Electric flux entering the surface, \( \Phi_{\text{in}} = 20000 \, \text{N/C} \cdot \text{m}^2 \)
- Electric flux leaving the surface, \( \Phi_{\text{out}} = 30000 \, \text{N/C} \cdot \text{m}^2 \)

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