The problem involves checking the stability of a slope, which requires calculating the factor of safety (FoS). However, the slope angle you've provided (180 degrees) seems incorrect since a slope angle cannot be 180 degrees (it would represent a flat or even inverted condition). Typically, slope angles are less than 90 degrees. Please confirm or provide the correct slope angle.

Given:

• Slope height $H = 5$ m
• Slope angle $\beta$ = [Please confirm the correct angle]
• Saturated unit weight $\gamma_{\text{sat}} = 18$ kN/m³
• Cohesion $c = 10$ kN/m²
• Angle of internal friction $\phi = 25^\circ$

Once you confirm the slope angle, I can proceed with the calculation.