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Question
The contact pressure for a rigid foundation on a cohesionless soil is
A.
Uniform
B.
Greater at the centre and decreases towards the outer edge
C.
Smallest at the centre and increases towards the outer edge
D.
Zero at the centre and maximum at the outer edge
Answer ( Option B)

Greater at the centre and decreases towards the outer edge

Solution

Rigid Footing
Cohesionless soil Cohesive soil
Contact pressure is maximum at centre and zero at edges Contact pressure is minimum at centre and maximum at edges 
Uniform settlement Uniform settlement
Flexible Footing
Cohesionless soil Cohesive soil
Contact pressure is uniform                               Contact pressure is uniform                            
 Settlement is minimum at centre and maximum at edges Settlement is maximum at centre and minimum at edges

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