- #1
IronBrain
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Homework Statement
A car travels up the hill at a constant speed of 30 km/h, then returns down hill at the speed 66 km/h. Calculate the average speed round trip
I can't believe I am stumped on such a kindergarten problem, I hate online homework and the garbage system they are designed on.
Homework Equations
The Attempt at a Solution
[itex]\frac{66+30}{2} =48 km/h[/itex]
Says I am wrong, which I prolly am, then states the average speed is the ratio of the total displacement over time, obviously, then says use to D to symbolize distance if need be...?