Question

The vertical stress at some depth below the corner of a 2 m $\times$ 3 m rectangular footing due to a certain load intensity is 100$KN/m^2$. What will be the vertical stress in $KN/m^2$ below the centre of a 4 m $\times$ 6m rectangular footing at the same depth and same load intensity?

• A. 25
• B. 100
• C. 200
• D. 400

Answer 1

The correct option is D 400


All part I, II, III and IV are of equal area

Vertical stress at the centre of rectangular footing (4m $\times$ 6m)

$=[verticalstressatthecentreofpart-I,(2m\times 3m\left)\right]\times 4$

$=100\times$ 4

$=400KN/m^2$