Q105
In Metalliferous mines, during extraction of ore and any other mineral, the working height of the bench shall not exceed A m and angle of slope should not exceed B m from the horizontal. A & B are given by
A.
2 m and 15°
B.
3 m and 30°
C.
4 m and 45°
D.
6 m and 60°
AnswerAnswer: Option D
Solution
Answer: Option D
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