railway DFCCIL Executive 2025 Mock Test Reinforced Concrete Structures Limit State Method

IS 456 : 2000 कंक्रीट की लोच के प्राणांक (Ec) को निर्दिष्ट करता है:

1
\(3000\sqrt {{{\rm{f}}_{{\rm{ck}}}}} \)​
2
\(5000\sqrt {{{\rm{f}}_{{\rm{ck}}}}}\)
3
\(9000\sqrt {{{\rm{f}}_{{\rm{ck}}}}}\)
4
\(7000\sqrt {{{\rm{f}}_{{\rm{ck}}}}}\)
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