The relationship between space, time and velocity for a uniform motion is given by:

where
S is the distance covered
t is the time
v is the velocity
The plane in our problem has a velocity of

and so during a total time of t=4 h, the distance it covers is

therefore, 680 miles.
Answer:
A) 5/6
r²
Step-by-step explanation:
360-60=300
300/360=5/6