Question

1) In sewerage manholes are located at every:
a. 20-25m, b.50-60m
2)Sludge in separate tanks is decomposed to get biogas by:
a.aerobic bacteria,b.anaerobic bacteria​

Answer 1

Answer:

the correct answer is 1 a 2b

Answer 2

Answer:

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and

right answer is

1. a

2. b