Answer:
20 pavers
Step-by-step explanation:
step 1
Find the area of the rectangular patio
The area of a rectangle is equal to
[tex]A=LW[/tex]
we have
[tex]L=20\ ft\\W=4\ ft[/tex]
substitute
[tex]A=(20)(4)=80\ ft^2[/tex]
step 2
Find the area of one square paver
The area of a square is equal to
[tex]A=s^2[/tex]
we have
[tex]s=2\ ft[/tex] ---> length side of the paver
substitute
[tex]A=2^2=4\ ft^2[/tex]
step 3
Divide the area of the rectangular patio by the area of one paver to find out the number of pavers needed
[tex]80/4=20\ pavers[/tex]