Answer:
ρ = 1061 kg/m³
Explanation:
The pressure at the top pf the box is clearly different from the pressure at the bottom of of the box due to the depth. So the problem can be solve the following way:
Difference in pressure = density * acceleration due to gravity * height
ΔP = ρgΔh
112 000 Pa - 109 400 Pa = ρ * 9.8 m/s² * 0.25 m
ρ = 1061 kg/m³
