If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is_______________? / MCQs / Q&A, RCC Structures Design / By admin If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is_______________? A. 40 B. 45 C. 50D. 55