Answer :
Let's figure out the area to paint on one target.
The area to paint in white is the middle circle.
Its area is therefore the area of a circle of radius 2*3in minus the area of the red circle inside, which is 3 in (see the attached picture).
Hence the area to paint is A=pi(2*3)^2-pi(3)^2=pi(36-9)=27pi sq in.
Using pi~3.14, A=84.78 square inches
One square inch is approximately 0.006944 square feet hence A=84.78*0.006944=0.5887 square feet.
There are 10 targets to paint thus the total area to paint is 5.887 square feet.
Now for the read area : the read area is the total target's area minus the white area.
Total area of one target : pi*(3+3+3)^2=81*pi~254.34 sq in=1.766 square feet
Hence for 10 targets the total area is 17.66 square feet.
Thus the total area to paint in red is 17.66-5.887=11.773 square feet
You can paint 16 square feet of each paint, hence you have enough paint to do your work.
The area to paint in white is the middle circle.
Its area is therefore the area of a circle of radius 2*3in minus the area of the red circle inside, which is 3 in (see the attached picture).
Hence the area to paint is A=pi(2*3)^2-pi(3)^2=pi(36-9)=27pi sq in.
Using pi~3.14, A=84.78 square inches
One square inch is approximately 0.006944 square feet hence A=84.78*0.006944=0.5887 square feet.
There are 10 targets to paint thus the total area to paint is 5.887 square feet.
Now for the read area : the read area is the total target's area minus the white area.
Total area of one target : pi*(3+3+3)^2=81*pi~254.34 sq in=1.766 square feet
Hence for 10 targets the total area is 17.66 square feet.
Thus the total area to paint in red is 17.66-5.887=11.773 square feet
You can paint 16 square feet of each paint, hence you have enough paint to do your work.
