It is long the Volga River of 3690 km. Tourists passed by boats the third part it are long. How many days did they float if moved with a speed of 6 km/h and daily were in swimming on 5 h?

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6*5=30 (km) - every day 3690:3*1=1230 (km) - the 3rd Part 1230:30=41 (dn) the answer. they floated 41 days if it is necessary to learn how much they floated that one more action is necessary: 41*3=123 (dn) answer. they floated 123 days
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