Average speed

The average speed of a good cyclist is 30 km/h. The average speed of the less able is 20 km/h. They both set off on the same route at the same time. A good cyclist drove it 2 hours earlier. How long was the route?

Correct answer:

s =  120 km

Step-by-step explanation:

v1=30 km/h v2=20 km/h  s=v1 (t2) s=v2 t s=30 (t2) s=20 t  s30t=60 s20t=0  Row2Row1Row2 s30t=60 10t=60  t=1060=6 s=60+30t=60+30 6=120  s=120 t=6

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