Answer:
Average speed = 68 mph
Explanation:
Given that,
Total distance traveled by the family, d = 340 miles
The family traveled 5 hours southeast.
We need to find her average speed. The speed of an object is given by the total distance covered divided by time taken. So,
[tex]v=\dfrac{d}{t}[/tex]
Put all the values,
[tex]v=\dfrac{340}{5}\\\\v=68\ mph[/tex]
So, her average speed is equal to 68 mph.