Bratislava 64954

A truck drove from Bratislava to Banská Bystrica at a speed of 30 km/h. At the same time, a tractor drove at a speed of 40 km/h. The tractor arrived in Banská Bystrica 1 hour and 45 minutes earlier than the truck. What is the distance between the cities?

Correct answer:

s =  210 km

Step-by-step explanation:

v1=30 km/h v2=40 km/h t=1+45/60=47=1.75 h  s = v1 (x+t) = v2 x  v1 x + v1 t= v2 x  x=v1 t/(v2v1)=30 1.75/(4030)=421=5.25 h  s=v2 x=40 5.25=210 km

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