Трасса велогонки состоит из трёх одинаковых кругов. если первый круг велосипедист проехал со средней скоростью =23км/ч, второй =23км/ч, третий =14км/ч, то всю трассу велосипед проехал со средней скоростью = 1)18км/ч, 2)19км/ч, 3)20км/ч, 4)21км/ч, 5)22км/ч.
aliha001
3
13.09.2019 05:50
1
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ответ: вариант 3 (20км/ч)