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This question belongs to Mining Engineering Coal Mining

Coal Mining

?

In a gallery of 4.2 m width and 2.1 m height and 1 m depth, sp.gr. of coal is 11; the coal available for blast is for four rounds of solid blasting.

A) 20 t B) 32 t C) 40 t D) 38 t

Answer & Solution

Correct Answer: Option B

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Question posted by Examveda

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