SOLUTION: if you drive 45 miles per hour for 90 miles the 50 miles per hour for 50 miles and 72 miles per hour for 72 miles what is your average speed? A.50miles per hour B.51 miles per ho

Question 475732: if you drive 45 miles per hour for 90 miles the 50 miles per hour for 50 miles and 72 miles per hour for 72 miles what is your average speed?
A.50miles per hour
B.51 miles per hour
C.52 Miles per hour
D.53 Miles per hour
E.54 miles per hour
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Use d = rt --> t = d/r to get the time at each speed.
Add them to get the total time.
Divide the total distance by the total time.

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