D is the diameter of a circular sewer and α is the side of a square section sewer. If both are hydraulically equivalent, the relationship which holds good, is

D is the diameter of a circular sewer and α is the side of a square s

1.	D is the diameter of a circular sewer and α is the side of a square section sewer. If both are hydraulically equivalent, the relationship which holds good, is
A.	πD^8/3 = 4 b^8/3
B.	πD^3/8 = 4 b^3/8
C.	πD^2/3 = 4 b^2/3
D.	πD^3/2 = 4 b^3/2
Answer» B. πD^3/8 = 4 b^3/8