Explanation:
The fundamental units are such types of units that are not dependent upon any other units. In this problem, we need to find the units that need to be convert before being used for a calculation.
Option (1) m
m stands for meter. It is one of the fundamental unit. It should remains the same.
Option (2) cm
cm stands for centimeter. If a unit is in cm, then it must be converted to meter using the conversion i.e. [tex]1\ cm=100\ m[/tex].
Option (3) ks
ks stands for kilo second. If a unit is in ks, it must be converted to second (s) using the conversion i.e. [tex]1\ ks=1000\ s[/tex].
Option (4) kg/m³
The SIT unit of density is kg/m³. It is unit that is derived from the fundamental unit. It should remains the same.
Answer:
So, the options that need to be converted before being used for a calculation are (b) and (c).
Reference:
brainly.com/question/12750330
