Answer:
b.[tex]t=\frac{1}{2} hour[/tex]
Explanation:
Conceptual analysis
The average velocity (v) is defined as the ratio between the displacement (d) that a body performed and the total time (t) that the displacement lasted and is calculated using the following formula:
[tex]v=\frac{d}{t}[/tex]Formula (1)
v: velocity
d: Displacement
t: Time
Known data:
[tex]v=60 \frac{miles}{hour}[/tex]
d = 30 miles
Problem development
We replace data in formula (1):
[tex]60\frac{miles}{hour}[/tex]=[tex]\frac{30miles}{t}[/tex]
[tex]t= \frac{30 miles}{60\frac{miles}{hour} }[/tex]
[tex]t=\frac{1}{2} hour[/tex]
