if you drive to your spring break destination at a steady 60 miles per hour and Return at a steady 40 miles per hour what is your average speed for the round tr
Mathematics
lesliez6
Question
if you drive to your spring break destination at a steady 60 miles per hour and Return at a steady 40 miles per hour what is your average speed for the round trip?
1 Answer

1. User Answers Anonym
d = distance to & from spring break destination
t1 = d/60 = time to get there
t2 = d/40 = time to get back
avg speed = (total distance)/(total time)
= 2d/(d/60+d/40)
Divide numerator and denominator by d:
= (2/(1/60 + 1/40))
Multiply numerator and denominator by 120:
= 240/(2 + 3)
= 240/5
= 480/10
= 48 mi/hr is the average speed round trip.
Trentt31