The average speed is given by:
average speed=(total distance)/(total time)
total time for the first 30 miles was:
time=distance/speed
=30/30
=1 hr
total time for the remaining 30 miles
=30/60
=0.5
hence the average speed will be:
speed=(30+30)/(1+0.5)=60/1.5=40 miles per hour
So just add all of them together and you get 405. Then divide by the amount of numbers there is which is 5. So 405 divided by 5. The answer is 81.
Answer:
40 min
Step-by-step explanation:
find unit rateeee p=problems
8 p= 2 min
8/2=4
so Alison can do 4 math problems per minute
so 160/4= 40 minutes
hope this helps
Answer:
here
Step-by-step explanation:
