lm424142 lm424142

17-09-2022
Mathematics

contestada

Michael drove from point A to point B at 15 miles
per hour and immediately returned by the same
route at 30 miles per hour. What was his average
speed, in miles per hour, for the entire trip?
E. 20
F. 22.5
G. 24
H.25

Respuesta :

jsimpson11000 jsimpson11000

17-09-2022

Answer:

E

Step-by-step explanation:

Say the distance is 'd'

time for going = d/15

time for returning = d/30

average speed = total distance / ( total time)

= 2d / ( d/15 + d/30 )

solve for average speed = 20 mi/hr

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e2020man17 e2020man17

17-09-2022

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