Answer:
The value is
![\Delta P = 40082 \ Pa](https://img.qammunity.org/2021/formulas/physics/college/lwzr1mob3ki5gsy4j6i9p27ru7hq6os1s0.png)
Step-by-step explanation:
From the question we are told that
The length of the bottom of the barge below the water line when loaded is
![d_2 = 4.09 \ m](https://img.qammunity.org/2021/formulas/physics/college/cqp8h457uw8oxz2zfkr09dpa9xsn54gjk7.png)
The length of the bottom of the barge below the water line when empty is
![d_1 = 1.80 \ m](https://img.qammunity.org/2021/formulas/physics/college/zlz2yajx4nvxyp4g9pv94xe0jt14bogc33.png)
Generally the difference in pressure is mathematically represented as
![\Delta P = \rho * g * d_2](https://img.qammunity.org/2021/formulas/physics/college/7cau3zxbkke245289cvi10p898bpwxzkua.png)
Here
is the density of water with value
![\rho = 1000 \ kg/m^3](https://img.qammunity.org/2021/formulas/physics/college/9szzbqh9ub7adib4o71qy4kr702jpe73bv.png)
![\Delta P = 1000 * 9.8 * ( 4.09 )](https://img.qammunity.org/2021/formulas/physics/college/gbsplfxmm80yzzdbrdg6d7zbjmw8cornnz.png)
=>
![\Delta P = 40082 \ Pa](https://img.qammunity.org/2021/formulas/physics/college/lwzr1mob3ki5gsy4j6i9p27ru7hq6os1s0.png)