Effective depth of septic tank of 10 users is about (a) 1.0 m (b) 1.2 m* (c) 1.7 m (d) 2.0 m

Effective depth of septic tank of 10 users is about
(a) 1.0 m
() 1.2 m*
(c) 1.7 m
(d) 2.0 m
by

1 Answer

Answer :

b) 1.2 m*
by

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