Q280
In connection with the precautions where gas exists, all apparatus, including portable and transportable apparatus used at any place within "A" meters of any workings or goaf in case of 3rd degree gassy mine. A is given by
A.
90 m
B.
180 m
C.
270 m
AnswerD.
360 m
Answer: Option C
Solution
Answer: Option C
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