engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Fitter Machining

Find the surface speed of the grinding wheel if the diameter of the grinding wheel is 300 mm (d) and RPM of the spindle is 2000 (N) ?

1
31.4 m/sec
2
35.6 m/sec
3
37.5 m/sec
4
38.7 m/sec
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