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21. How much should a machinist decrease the diameter of a pipe with a diameter of 1.73 in if the diameter must be 1.5 +0.2 inches?

Sagot :

we have the following:

[tex]1.73-1.5-0.2=0.03[/tex]

therefore, the answer is 0.04 inches, should decrease the diameter of pipe 0.03 inches