In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is________?

A funicular polygon cannot be made to pass through________?

Aerobic bacterias________?

Which of the following chemical compounds can be used for dechlorination of water?

The maximum depth of sedimentation tanks, is kept________?

Minimum thickness of stiffening wall for 1 to 3 storeys shall not be less than________?