Sum of tread and rise must lie between
A. 300 to 350 mm
B. 400 to 450 mm
C. 500 to 550 mm
D. 600 to 650 mm
Answer:A
Sum of tread and rise must lie between
A. 300 to 350 mm B. 400 to 450 mm C. 500 to 550 mm D. 600 to 650 mm