SOLUTION: A car travels 100 km at a speed of 60 km/h and returns with a speed of 40 km/h. Find the average speed for the whole journey
Algebra.Com
Question 388680: A car travels 100 km at a speed of 60 km/h and returns with a speed of 40 km/h. Find the average speed for the whole journey
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
We can use the harmonic mean of the two rates: km/hr.
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