Question

Which of the following can be the units of perimeter and area respectively?

• A. $m$ and $m^2$
• B. $m^2$ and $m$
• C. $cm$ and $c{m}^2$
• D. $c{m}^2$ and $cm$

Answer 1

Answer: (A), (C)

The correct options are
A $m$ and $m^2$
C $cm$ and $c{m}^2$

Perimeter is the boundary length of a closed figure.

As it is the sum of lengths of all the sides of the closed figure, its unit is the same as that of the length i.e. $m$, $cm$, $mm$, etc.

Area is the region enclosed by the boundary of a shape
.
As it is generally the product of the two sides of the shape, it is measured in square units i.e. $m^2,c{m}^2,m{m}^2$, etc.