Do you have any answer choices
The area of the circle is going to be 50.27 because the equation for the area of a circle is pie • r^2 and the radius is 4 feet because radius is half the diameter and the circumference of the circle will be 25.13 because the formula for circumference is 2• pie • r
We know that
speed=distance/time
distance=speed*time
in this problem
speed1=14 miles/hour
speed2=20 miles/hour
average speed=[14+20]/2-----> 17 miles/hour
time=3 2/5 hour-----> (3*5+2)/5----> 17/5 hours
distance=17*(17/5)----> 57.8 miles
the answer is
57.8 miles