Question 870764: a truck can travel 90 miles at the same speed a car travels 130 miles. if the trucks rate is 20 miles per hour slower than the cars, whats the average speed
Answer by JulietG(1812)   (Show Source):
You can put this solution on YOUR website!
What is the difference in distance between the two vehicles? 130-90 = 40
What is the difference in RATE between the two vehicles? 20 mph [given]
Therefore, they have traveled two hours.
The truck traveled 90 miles in 2 hours, or 90/2 = 45 mph
The car traveled 130 miles in 2 hours, or 130/2 = 65 mph
The average speed is (45 + 65)/2, or 110/2, or 55 mph
|
|
|
