RCC Structures Design
In a pre-stressed member it is advisable to use

Low strength concrete but high tensile steel
High strength concrete and high tensile steel
High strength concrete only
Low strength concrete only

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RCC Structures Design
The angle of internal friction of soil mass is the angle whose

Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane
Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
None of these

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