In a development coal face, 12 holes are drilled and charged with explosive. Holes are initiated with electric delay detonators connected in series. The length of a detonator lead wire is 1.5 m. The length of the blasting cable is 120 m.
| Parameter | Value |
|---|---|
| Resistance of each detonator | |
| Resistance of lead wire | |
| Resistance of one wire of the blasting cable |
The total resistance of the circuit in Ω, is _____. (round off up to 2 decimals)
Min: 20.8 Max: 21.9
Answer: 21.35
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