GATE PI 2026 PI Q33: Machining

A modified Taylor tool life equation is given as follows:

where

is the cutting speed (m/s),

is the tool life in minutes and

is the feed in mm/rev,

and

. Under two different cutting conditions

and

the tool life

was found to be the same.

If the ratio of the cutting speeds

used is 2/3, then the ratio of corresponding feeds

must be _____ (rounded off to two decimal places).

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