- #1
cmkc109
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Homework Statement
A car travels at a speed v (km/h) for 40 minutes, then at a speed v/2 for 40 minutes, and finally at a speed v/3 for 20 minutes. What is the average speed for the trip
Homework Equations
avg v = displacement / time
The Attempt at a Solution
40v + 20v + 20/3 v = displacement
time = 40+ 40+ 20 = 100minutes
The answer given is 33.33
but, how do you cancel out the v.. I'm confused :(