Emmanuelle travels the first 60 miles of a trip at an average rate of 30 miles per hour. For the next 120 miles she averages 40 miles per hour. What is her average rate for the entire trip?

Question

anonymous · Answer

45 miles and hour

anonymous · Answer

ok the way i see it is weighted averages.  So since Emmanuelle traveled 2 times as far going 40 mph that has a weight of 2 times the other average.  there fore you do (40(2) + 30)/3 = 36.7 mph (approx)

but im not 100% sure!