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General Science for RRB JE, NTPC Exam : Part 42 (in Hindi)
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Hemant Mishra is teaching live on Unacademy Plus

Hemant Mishra
Cleared RRB Clerk , SBI Clerk pre, NTPC 2016, 1 year experience in software developing along with 5 year Experience in Teaching .

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Unacademy user
sir This is Nose radius in case of single point cutting tool....nose is the tip of tool which has a curvature and its radius is measured in "inch" according to American standards association....but in this question all options have unit of angles...and only one option has unit of distance...so simply can choose mm.