Hydrostatic pressure in layered fluids Steps:

• Convert depths to meters: water = 0.08 m, oil = 0.05 m.
• Use g = 10 m/s² for calculation.
• Pressure from water: 1000 kg/m³ × 10 m/s² × 0.08 m = 800 Pa.
• Pressure from oil: 800 kg/m³ × 10 m/s² × 0.05 m = 400 Pa.
• Total pressure: 800 Pa + 400 Pa = 1200 Pa. Why C is correct:
• Total pressure equals the sum of each layer's hydrostatic pressure (P = ρgh), accounting for different densities and depths. Why the others are wrong:
• A: Only oil pressure (≈400 Pa, rounded down).
• B: Water pressure plus partial oil contribution (800 + ≈90 Pa).
• D: Incorrectly uses water density for total height (1000 × 10 × 0.13 = 1300 Pa).

Final answer: C