why can a pace as a footstep not be used as a standard unit of length - Science - Motion and Measurement of Distances

Question

why can a pace as a footstep not be used as a standard unit of
length

Avirhal · Answer

Hi A pace or a footstep cannot be used as a standard unit of
length because everybody's bodyparts are different in size and this
causes confusion in the measurement of an object that is why we
need some common set of units to measure things These common set of
units are International
System
of
Units
(SI
Units)
Hope my answer helps :) Cheers!!!