As per Rankine's Analysis, calculate the minimum depth of foundation for a soil having an intensity of loading of 150 kN/m2, unit weight of 16.2 kN/m3, and an angle of internal friction of 28°.

Calculate the minimum depth of a shallow foundation using Rankine's formula if the pressure at the base of the footing is 30 kN/m2 and the angle of repose of the given soil is 30°. Assume the unit weight of the soil as 15 kN/m3.

An RCC footing has a plan size of 2 m × 2 m and supports a safe bearing capacity of 200 kN/m2. What is the total safe load that the footing can carry?