engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Fitter Machining Drilling and Reaming
What is the formula to find out RPM of drill?
1
\(\rm \frac{d\times1000}{V\times \pi}\)
2
\(\rm \frac{\pi\times1000}{V\times d}\)
3
\(\rm \frac{V\times1000}{ \pi d}\)
4
\(\rm \frac{\pi d}{V\times 1000}\)