The effective depth of a singly reinforced rectangular beam is 400 mm. – McqOptions

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1.	The effective depth of a singly reinforced rectangular beam is 400 mm. The section is over-reinforced and the neutral axis is 180 mm below the top. If the maximum stress attained by concrete is 5 N/mm2 and the modular ratio is 18, then the stress developed in the steel will be
A.	110 N/mm2
B.	135 N/mm2
C.	160 N/mm2
D.	180 N/mm2
Answer» B. 135 N/mm2

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