The minimum cube strength of concrete used for a pre-stressed member, is
(A) 50 kg/cm2
(B) 150 kg/cm2
(C) 250 kg/cm2
(D) 350 kg/cm2
The correct Answer Is
(D) 350 kg/cm2
(A) 50 kg/cm2
(B) 150 kg/cm2
(C) 250 kg/cm2
(D) 350 kg/cm2
The correct Answer Is
(D) 350 kg/cm2