In the formula IP=\(\frac{plan}{60}\), In what scale l(length) has to be considered?

In the formula IP=\(\frac{plan}{60}\), In what scale l(length) has to

1.	In the formula IP=\(\frac{plan}{60}\), In what scale l(length) has to be considered?
A.	mm
B.	Km
C.	m
D.	µm
Answer» D. µm