- 200, 35
- 500, 50
- 100, 50
- 300, 50
- 100, 35
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) At every below ground mine rescue room shall be established, where more than___persons are ordinarily employed below ground and there is no rescue station within its radius of ___ km.
Solution:
100, 35
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