Why length, mass and time are chosen

unitsandmeasurement
cbse

#1

Why length, mass and time are chosen as base quantities in mechanics?


#2

In mechanics, length, mass and time are chosen as the base quantities because
(i) there is nothing simpler to length, mass and time.
(ii) all other quantities in mechanics can be expressed "in r terms of length, mass and time.
(iii) length, mass and time cannot be derived from one another.