Answer:
[tex]\large\boxed{C=30\pi\ ft,\ A=225\pi\ ft^2}[/tex]
Step-by-step explanation:
The formula of a circumference of a circle:
[tex]C=d\pi[/tex]
d - diameter
The formula of an area of a circle:
[tex]A=\pi r^2[/tex]
r - radius
We have the diameter d = 30 ft. We know d= 2r.
Therefore r = 30 : 2 = 15 ft.
Substitute:
[tex]C=30\pi\ ft\\\\A=\pi(15^2)=225\pi\ ft^2[/tex]
