RCC Structures Design
To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

b/6
b/4
b/3
b/5

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RCC Structures Design
Pick up the assumption for the design of a pre-stressed concrete member from the following:

A transverse plane section remains a plane after bending
Variation of stress in reinforcement due to changes in external loading is negligible
During deformation limits, Hook's law is equally applicable to concrete as well as to steel
All listed here

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