An emulsion explosive of specific gravity 1.25 is used for blasting in – McqOptions

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1.	An emulsion explosive of specific gravity 1.25 is used for blasting in an iron ore formation having P-wave velocity of 3000 m/s and specific gravity of 3.20. For an explosive impedance to rock impedance ratio of 0.5, the desired velocity of detonation of the explosive in m/s is
A.	3840
B.	4000
C.	4200
D.	7680
Answer» B. 4000

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