Makarska 81876

The motor boat departs from Baška Voda at 19:15 and arrives in Makarska at an average speed of 30 km/h at 20:00. However, a group of tourists from Germany must be in Makarska a third of the time earlier. What should the average speed of the boat be?

Correct answer:

v2 =  45 km/h

Step-by-step explanation:

t1=19:15=19 hr 15 min =19+6015=19.25 hr=19.25 t2=20:0=20 hr =0.5 v1=30 km/h  t=t2t1=0.519.25=43=0.75 h  s=v1 t=30 0.75=245=22.5 km  t2=tt/3=0.750.75/3=21=0.5 h  v2=t2s=0.522.5=45 km/h

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