The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity
dams should be
(A) Between 150 to 300 kg/cm2
(B) Between 350 to 600 kg/cm2
(C) Between 150 to 500 kg/cm2
(D) Below 200 kg/cm2
dams should be
(A) Between 150 to 300 kg/cm2
(B) Between 350 to 600 kg/cm2
(C) Between 150 to 500 kg/cm2
(D) Below 200 kg/cm2