Tourist walk at 4.1 km/h. Every 5 km have 20-minute break. How many kilometers passed, when started at 4:40 and finished at 10:30?

Correct answer:

x =  19.8 km

Step-by-step explanation:

va=6020+45.15=3.22 km/h t=104+603040=5.83 h s1=553.225.8333333333333=15 km t1=15/3.22=4.66 h t2=5.834.66=1.17 h  s=s1+s2=s1+t2v=15+1.174.1=19.8 km

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