If the diameter of a compact disk is 14 cm and the diameter of the hole in the center of the disk is 2 cm, what is the area of the compact disk?
Could someone please explain clearly, if possible with diagram?
Area of the compact disc would be the difference between the area of the disc minus the area of the hole:
Dia = 14cm / radius = 7cm
Area = Pi*7^2=49Pi
Dia = 2cm/radius = 1cm
Area = Pi*1^2=Pi
Hence area of the compact disc = 49Pi-Pi=48 Pi
Answer choice A