Total body water is: (A) 40% of body weight, (B) 20% of body weight, (C) 10% of body weight, (D) 60% of body weight
Answer is D. In the average young adult male, 18% of the body weight is protein and related substances, 7% is mineral, and 15% is fat. The remaining 60% is water.(REF: GANONG'S REVIEW OF MEDICAL PHYSIOLOGY 23rd EDITION page no.2)