Answer:
Option A ( radius is twice the daimeter )
Step-by-step explanation:
The relationship between radius and daimeter is given as
Radius² = Daimeter ⇒ r² = d
And cricumference can be calculated with radius
As circumference is 2πr
31,680 feet per hour.
There are 5280 feet in a mile, so 6(5280)=31,680
I think b I might be wrong
Answer:

Step-by-step explanation:

Adjust based on LCM (15):


