A. It is cheaper in construction
B. It provides maximum area for a given perimeter
C. It provides maximum hydraulic mean depth
D. All the above
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
