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.	m
Answer» D. m