Q98
Air samples collected from the intake and the return gates of a retreating longwall face show methane concentration values of 0.1% and 0.8% respectively. The production from the longwall face is 2000 tonne/day and the air quantity circulating the face is 15 m3/s. The rate of methane emission in m3 per tonne of coal produced is
A.
11
B.
9.5
C.
5.5
D.
4.5
AnswerAnswer: Option D
Solution
Answer: Option D
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