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The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?

/ Civil Engineering Mcqs, Waste Water Engineering / By
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?

A. 20 cm
B. 25 cm
C. 40 cm
D. 50 cm