Question

How to find the correct unit of measurement? I am struggling with this. What is the difference between ft³, ft and ft²? Example:
the length of a rectangular play area is 40 ft. The width of the play area is 20 ft.

Which is the correct unit of measurement to use when figuring out how much fence is needed to surround the play area?

A.
ft³

B.
ft

C.
ft²

Answer 1

ft is one dimensional - like length , width , perimeter

Answer 2

@Welshfella, so what does ft³ and ft² mean?

Answer 3

ft^2 is 2 dimensional :- area ( length * width = area)
ft^3 is 3 dimensional : - volume

Answer 4

\[ft^3=ft*ft*ft=volume(three~dimensional)\]
\[ft^2=ft*ft=area (two~dimensional)\]

Answer 5

Here's a little drawing that may help you one dimensional 2 dimensional we have area here we have volume which is ft^3 which is three dimensional