Question

Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.

a.

0.1 to 0.5

b.

1.5 to 4.5

c.

7.5 to 12.5

d.

15-20

Answer: (b).1.5 to 4.5

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Q. Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.

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