Motorcycle 12381

The motorcycle left Děčín at an average speed of 40 km/h. At the same time, a passenger car from Prague drove towards him at an average speed of 80 km/h. The distance from Prague to Děčín is about 100 km. How long and at what distance from Děčín will both vehicles run out?

Correct answer:

t =  0.8333 h
s =  33.3333 km

Step-by-step explanation:


40t + 80t = 100

40·t + 80·t = 100

120t = 100


t = 100/120 = 0.83333333

t = 5/6 ≈ 0.833333

Our simple equation calculator calculates it.
s=40 t=40 0.8333=33.3333 km



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