Calculate 19023

A car traveled from city A to city B at a speed of 40 km/h, then from B to C at 60 km/h, and finally from C to D at 50 km/h. Calculate the car's average speed over the entire route from A to D if the distance from A to B is 20% of the total distance and from B to C is 30% of the total distance.

Correct answer:

v =  51 km/h

Step-by-step explanation:

v1=40 km/h v2=60 km/h v3=50 km/h  v=v1 0.20+v2 0.30+v3 (10.200.30)=40 0.20+60 0.30+50 (10.200.30)=51 km/h



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