Every return airway as lies within . . . . . . . . meters of last working face and every haulage, shall be divided in to zones not longer than . . . . . . . . meters and . . . . . . . . meters each.
A. 200, 100, 50
B. 100, 50, 25
C. 75, 50, 25
D. 300, 200, 80
Answer: Option A
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