Answer:
=39.42857143 miles per hour
Step-by-step explanation:
To find the average speed, we need to the total distance and the total time
Distance 1
45 miles for 2 hours
45*2 = 90 miles
Distance 2
90 minutes * 1 hour/60 minutes = 1.5 hours
32 miles * 1.5 hours =48 miles
The total distance = 90+48 = 138 miles
The total time = 2 +1.5 = 3.5 hour
The average speed = total distance/ total time
= 138/3.5
=39.42857143 miles per hour
average speed = [tex]\frac{total distance}{total time}[/tex]
45 mph for 2 hours to distance = 45miles x 2 hours = 90 miles
convert 90 minutes to hours: [tex]\frac{90 minutes}{60 minutes} × 1 hour =1.5 hours[/tex]
32 mph for 1.5 hours = 48 miles
average speed = [tex]\frac{90+48 miles}{2+1.5 hours} = 39.429 miles/hour[/tex]
