A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is

Given
Height of cylindrical ejector,H=2m
Filling time,t=10min =600s
Peak sewage discharge,
Q=0.0157m^3/s

1. Volume of sewage collected
V=Qt
V=0.0157*600
V=9.42m^3
2. Volume of cylindrical chamber
V=3.14*d^2 *H/4
9.42=3.14*d^2*2/4
D^2=5.997
D=2.45m
So the diameter of the ejector chamber is approximately 2.45 m (2450 mm).