The effective depth of a singly reinforced rectangular beam is 300mm. the section is over-reinforced and the neutral axis is 120mm below the top. If the maximum stress attained by concrete is 5N/mn2 and the modular ratio is 18, then the stress developed in
the steel will
(a) 130N/mm2
(b) 135N/mm2
(c) 160N/mm2
(d) 180N/mm2
the steel will
(a) 130N/mm2
(b) 135N/mm2
(c) 160N/mm2
(d) 180N/mm2