Two parts journey

The driver of the car plans to drive 30 km in 0.5 hours. For 20 minutes he follows the convoy (traffic jam) at a speed of 30 km/h. What speed would he have to go in the remaining time?

Final Answer:

v =  120 km/h

Step-by-step explanation:

s=30 km t1=0.5 h t2=20 min h=20:60  h=0.33333 h v2=30 km/h  s1+s2 = s  v2 t2+v (t1t2)=s 30 0.33333333333333+v (0.50.33333333333333)=30  0.166667v=20  v=0.1666666720=120  v=120=120 km/h



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